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Hi from Spain. Could you help me? I just swap the tf999 to ax15 in my old 4.0l 91 YJ and now I don't have sparks in my plugs...I think that the problem is in the CSP, but is new (part number 56027866AB , buy in amazon )... the YJ Works perfect before the swap at morning. what do you think about it? Problem in the CSP, is different the PCM Between auto 4.0 and manual YJ...or anything. THANKS FOR ADVANCE, thanks for the re-clocking template and sorry for my language blunders.
My 19 yr old son was killed in August when his 2000 Jeep Wrangler hit a deer. He was half way through his Diesel Mechanics Certification. I bought a 2004 Jeep Wrangler & am trying to “twin” his Jeep. I want to try to do most of this mechanical stuff myself or at least try so I make him proud of his momma. I love ur videos...so helpful in all the details. Thank you for sharing ur knowledge!!
😊👍 A year later and I am using your video to help me fix my Wrangler. This the TJ instead of the YJ. Your video saving the day for troubleshooting. We Jeep lovers appreciate you 👍.
Great video it will help a lot of folks! Just a point of information, a bad crankshaft position sensor will shut the engine down when it's running and will not start when you attempt to start it back up, it shuts down spark. Sometimes it will restart after the engine cools down, but will shut down once the engine warms up again. A camshaft position sensor will allow the engine to run until you shut it off, and then will not start up again, it shuts down the fuel system. So if your Jeep shuts down abruptly and won't start back up with no spark, it's most likely a crankshaft position sensor, and if you park your Jeep and the next time you go to start it and it won't start up but you have spark, and the fuel pump doesn't run when you turn the key on, it's most likely a camshaft position sensor that's inside the distributor housing.
Glad you like the video! You also provided very good information! Thanks for adding that to the comments section. Lots of people will find the information useful. Thanks a bunch!! Have a great day!
Wow!!!!!! Great piece of info cause mine wouldn't start again but ran perfect till shut off!!! Saves me the hell of crank position sensor. Many thanks!!!
@@dandahermitseals5582 Never turn your yj off It should run forever. Hire a security team to watch over it while you sleep. Everytime I shut mine off it won't start again. I learned my lesson.
Thanks guy. I've got three Jeeps, CJ7, Cheokee, JK Wrangler. I once twisted wrenches on cars and trucks before I did the same on aircraft for 30+ years. I got way behind the power curve going from the newer cars/trucks/Jeeps from turbine engines. Way different technology. Your videos bring me up to this "new" technology for me. Oh yeah. I'm 77 and still cranking.
You go brother!! I hope I'm still cranking at that age. I really enjoy tinkering with Jeeps, Cars & motorcycles. Eventually I'm gonna get another Jeep to do a v8 swap on. Wouldn't making a street rod out of an old CJ5 tub ... hmm .. lol. Thanks for hanging out in my channel!! Glad you like my videos and thanks for taking the time to leave a great comment!
Changed out the crank shaft position sensor on my 01 Wrangler,due to my jeep shutting off while driving, and now I have no issues whatsoever. Thanks for the clip.
Very thorough ! That’s why they call it painstakingly ! You took the pain out of It for the viewer , you went the extra mile on explanation AND example , thx for your diligence .
I'm not one to post comments but my YJ broke down at work at midnight while i was parked in somebody's spot. Felt like an ass but did my research and it was the cps. Thanks to you i changed it out in like 2 minutes flat and got my jeep on the road again. Liked and subscribed.
Have been given a 01 TJ. The only problem is that it will cut off. Looking around the Wrangler boards and see " crankshaft position sensor ". Brought me to your page, and love it! So straight forward. Subbed, and liked. Hope this fixes my issue. Thank you!
There are 2 sensors that will prevent them from starting. Crankshaft position sensor and camshaft position sensor. If I understand what you are describing as it just randomly shutting off, that is typically the crankshaft position sensor. Good luck, hope you get it fixed!! Have a great day!
Thats why I create the videos! To help people repair their own Jeeps to save money and the great satisfaction of knowing you did it yourself! Thanks for taking the time to leave an awesome comment! Have a great day!!
Thanks for the video! I know I have a neutral safety switch problem and now I got a code for this sensor. My jeep has the sxs of not turning over and stalling and will only attempt to turn over in neutral. My reverse lights are not working I think that is related to the neutral safety switch. Anyway I will now try to replace this sensor and see what happens. Thanks for the video. Filming and directions seem great. I love the seasoned mechanic pointers!
Thanks .. glad you liked it! Hope the CPS changeout goes well for you! Thanks for checking out the video and thanks for taking the time to leave a great comment. Have a great day!
You are welcome! I carry an extra crank sensor with me at all times. They don't go out often. But there are 2 sensors that will leave you stranded. The crank position sensor and the cam position sensor. All the other sensors can make it run bad, but they will usually get you home. Glad the video helped you! Thanks for taking the time to leave an awesome comment! Have a great day!!
Very good, thanks for your help 👍 I have a '95 Jeep Wrangler that doesn't want to start because the crankshaft position sensor is not good, but now I know where and how to check it up
Damn glad I found this vid. He's right, this plug was replaced in later years & it's hard to find diagrams or vids on if you roll XJs. They're all on the oval plug. I guessed correctly what ABC were as I'm sure most woulda but you confirmed it. Oo, & thanks for the tip on the paper spacer on XJs , that woulda sucked. Just wish you woulda mentioned which letter corresponded with reference, ground, & output. Easily cross referenced with those fore mentioned diagrams though. Thanks Power Addicts, saved my DD rig
You're welcome! Glad the video helped you! I was thinking that I put a diagram on the website:www.fixjeeps.com/crankshaft-position-sensor.html . I looked and sure didn't. I gotta get one on there to make it complete. Thanks for pointing that out! Glad your XJ is rolling. Thanks for taking the time to leave a great comment! Have a great day!!
I'm confused - the video shows the round plug & you are testing across B & C - then you say that the round was replaced with a flat plug - A B C - then you say "you want the 2 outside poles" - does that mean test A & C on the flat plug? also, what is the 3rd pole? is it the power supply? & what voltage should it be?
Im new to jeeps, so always a good thing to have a buddy who knows....i have bought 2 cherokee and 2 wrangler with 4.0l just love them old things.all 90 s, so want them back on the road(or trails)..your vids are very well done and apreciated....from canada
Thanks!! Glad you like the vids. I know where a ZJ is for cheap, I've thought about buying it to wheel and beat on. But I already got too many toys as it is ...
Great video it really helped. here's a tip I did ,tie a string on sensor when you pull it up to the connector. when you install new sensor tie string to connector and pull it up.
When he tests the CPS in ohms and says it should have no resistance, the meter shows 1, and no resistance should show 0.0 When I bought a new CPS for my 4.0, it read 0.0 ohms, same as the one I removed after viewing this video. It turned out not to be the CPS but my Coil that gave me a false reading looking good, when I tested it, before researching additional reasons for the no-spark and found this video. The video did give some really good advice to be careful not dropping the CPS bolts in to the Bellhousing.
No, Actually there is no fault in the video. The reading is correct. If you were watching the meter it stays at "1" all the time with the leads "not touching" anything. When I touch the leads together it then went to almost 0, just measuring the resistance of the leads themselves. What I was saying in the video, there should be no change at all in the meter reading and there wasn't. The display in the meter never changed as it shouldn't when reading across pins B and C. I'm reading and quoting this straight from the Chrysler service manual as I type this ... "Place an ohm meter across terminals B and C. The meter reading should be open (no resistance). Replace sensor if a low resistance is indicated". The part where is says "The meter reading should be open" means an open circuit, as in, there should be NO change in the meters reading and again, there wasn't. Yes, I've measured sensors after releasing this video that also read 0.0 and the sensor still worked. But technically, the meter should read the sensor just like it is when its turned on with the leads touching nothing. This video will soon be 3 years old. That Crank sensor is the same sensor I'm still running today. No issues with the sensor or the video. Coils can be finicky testing them. Sometimes it depends on whether the coil is hot, warm or cold as to if it test good or bad. Crank position sensors can be tricky as well to diagnose. About 95% of the time when a crank sensor fails .. its done and not coming back to life. I know of a Cherokee that has had 2 Crank sensors changed out. Each time when the engine cooled it would start up and run till the engine got hot ... then .. fall on its face again. Testing the Crank sensor after the engine cooled enough to touch, it tested good be cause is was cooled down. The symptoms at this point says that the coil could be the issue. Tested the coil, it tested good because it had cooled down. Swapped in a known good coil, still fell on its face after getting hot. Swapped in another Crank sensor ran for over a year trouble free. When it acted up again showing the same symptoms, we swapped a crank sensor in a all was good again. Glad you got your ride going! Have a great day :-)
I just viewed your video tonight and found it to be of great help and of course I also signed up. Thanks for all the information and the way you put it out, very easy to understand too. I just acquired a non-running 91 Laredo, 4.0L, with the AW4 from a family member who couldn't get it started after last driving it a year ago. He put in a new fuel pump and the injectors are getting fuel. He put in new plugs and told me it was getting spark. I've recently installed a new N.S.S. safety switch and it cranks over in park and neutral, but no start. I will be checking out the CPS in the morning to see if its good, but based on all my reading and viewing, I think it might be the CPS or Coil. Manny Thanks. Tio AL.
Hello, so I just bought a yj Jeep and it ran great for about two months , now it wants to die when you put it in great , but idles good, it’s standard by the way , I’d really like your in put please, your videos are great I like how you explain step by step, thanks,Kellie
Thanks for the great video, and giving information that a country boy can actually understand. I too am a life long mechanic, but new to the jeep world. 99 TJ .now to go test my CPS. Will be shopping the Amazon site. Keep those videos coming
If the bolt falls in the hole then you can remove a steel plate on the bottom of the bell housing and fish it out from there, you don't have to separate the transmission from the engine.
Awesome video! I've purchased quite a bit of diagnostic equipment to identify the problem with my '97 Grand Cherokee. I don't mind because I've learned a lot about my Jeep. Plus new coil, cap, rotor, and cam position sensor (which I thought was a condenser!) have been installed. I'll test the crankshaft position sensor in the morning. I saw a sight that I should use Mopar only. Have you found success with other manufacturers of Crankshaft Position Sensors?
Thanks for the help. Been chasing an intermittent issue for a couple months (stalling, no start when jot etc). Hopefully the new one straightens it out.
Thanks for this video. I have a 1988 Cherokee that the crankshaft position sensor wire hit the exhaust manifold & melted. I barely got it home. I put a new one in, but it would turn over but no spark. I checked the new sensor with an ohm meter & I'm getting a reading on the meter it's not showing an open circuit. I'm hoping that after I replace the sensor again I can get it to start. Thanks.
Question everything I’ve read on the forums is saying 200 ohms of resistance is normal, but I bought a cps from Oreillys and it had about the same Resistance as the one I took out but the Jeep wouldn’t start at all with the new one but still will with the old one, so had them order me another one lol I’m at a loss tho 1990 Jeep Wrangler 2.5 TBI
Hey Drew! - I'm new to Jeep World having recently inherited a '90 Cherokee. I'm a mechanic wanna' be and (sure enough!) when doing my first Jeep tune-up managed to twist off the hold down screw on the distributor cap. SO....if there are any great tips on how to get the distributor back in CORRECTLY the 1st time , that'd be great. The vehicle runs but idles roughly after warm up. I heard a read a MILLION reasons why but have resolved to replacing each component that could be the culprit until I get it right. Don't know what else to do! The next potential culprit is CPS. and NOW, after watching your vid, I have a clue what I am doing AND WHY!!!The WHY is a big deal with me. When I "get" why it works or doesn't I seem more confident in what I am doing. Anyway, Thanks for taking time to 'splain stuff to us old "new" Jeep guys, keep up the good work, Man, you ARE appreciated!
+Bill Evans Thats without a doubt one video I need to do. Kinda hard to explain without showing it. Basically get number 1 cylinder on top of compression stroke (not exhaust stroke). Drop the distributor in so the the rotor button is pointing at number one cylinder. That will get you in the ball park. The rest is using a timing light to set the engine to factory timing spec by the harmonic balancer. Just a note, if the CPS was bad, it wouldn't rut at all. If it did it may run for a short time then shut down. I think the HOW isnt complete until the WHY is put with it. I naturally over analyze everything. I'm not satisfied with a half way explanation. That tends to show in my videos. I get flamed occasionally for my video being too long. Thats fine, haters will be haters. I get more praise for over explaining than negative. So .. I'm doing all right :-). So with that being said.. Thanks for the great review! That keeps me reassured that Im doing the right thing. Have a great day!
I hope you still have your TJ. It will be very interesting when the infamous, "No Bus," error comes up. After 415,000 miles on my aging TJ, the infamous, "No Bus," came for a visit. My computer is a mess. I jumped the fuel pump and the injectors and I am driving my TJ until I can get a computer. But it is not very pretty when the engine is cold. When thed engine is warm, you would neved guess there is something wrong.
I've had that happen before. It was strange, I had just moved the Jeep to a different spot in the driveway. I get in it a few minutes later and crank but no start. I was like "what the heck is going on!" I swapped the relay and was good to go! Thanks for dropping in a great suggestion for others to try! Have a great day!
Thanks!! I try to make them entertaining as well as educational. Thanks for checking out the video and taking the time to leave an awesome comment! Have a great day!
great video. trying to keep my cherokee running.you don,t by anychance have the bolt sizes for the bell housing to engine on a 94 xj with a 4.0 and an automatic .sure would appreciate the length and size. i think there is 3 differant sizes.
Great Video, Just one question... No Spark usually means Bad Coil.. How come you didn't test the Coil For Spark first before Blaming the CPS ? Does the CPS in fact make the Coil Work?
On Jeeps (Wranglers and Cherokees) of this generation, the CPS "usually" goes out before the coil. But obviously not every time. Yes, if the CPS fails, the coil stops firing. Good question .. thanks for asking! Have a great day!
If your crankshaft sensor is bad would your Jeep start up at all? And if it would start up will it cause your Jeep to cut out while your driving? It’s the only code my Jeep is throwing?
Hey Man thank for posting this video. I am in the process of rebuilding a 1991 jeep YJ. I have a problem no one else has though. My connector from the wiring harness has been on the exhaust manifold and is burnt to no recognition. I want to direct wire it to the CPS wiring but I dont know what color wire goes to the CPS wiring. Do you have a diagram of what color wire goes to the correct pin of the wiring harness connector? I can figure out what I need if I only knew which one of the 3 wires from the wiring harness goes to the correct pin. Hope this makes sense.
+Paul Roberts Yep .. it makes total sense. I'll look this weekend at the color codes. During the week I pull long hours. But, if you gently take a razor blade and cut off the burnt insulation to separate the copper parts of the wires. The copper part of the wires should at least allow you to see where they are going well enough to rewire. I've done that many many times.
+Power Addicts - Jeep, car and motorcycle tips Thanks for that input but my connector was badly burned and the wire connections were broken. I guess I could do trial and error method but it would be nice to know which one of the 3 wires go to the corresponding pin. I cant find a diagram of this anywhere.
While testing my crank sensor, I don't get any change at 200 Ohms but the meter jumps when I have it set to 2000 ohms. Does it matter that it doesn't move at 200 but moves at 2000?
I have the strangest problem, I believe that the cps won't work when it's cold. No spark, but later in the day when it warms up it starts. Have you heard of this before?
As strange as it sounds, I can see that happening. I've seen a few times as to when a CPS is going bad it would shut down when it got hot, then start back up once it cooled off. They aren't crazy expensive, change it out see what happens. Good luck and thanks for checking out the video. Have a great day!
Checked TP ok checked MAP ok checked CSP bad. Ok bought a new one, checked before I put it on ok. Put on new CPS, no spark. Checked new installed tested bad . Thanks any help. Doug
So if I do it like you did it on the sensor I get no reading. But if I measure pole B and c with the negative on b and positive on c I get a reading. Why do I not get a reading with positive on b and negative on c?
+Drew bandhauer - Hey Drew, you dont have the "reply" link under your comment. I use the parts store sensors. I typically don't by the cheapest thing they have. Whatever has the best warranty. I do favor Bosch parts when I can get them. Thanks for checking out the video and taking the time to leave a great comment! Have a great day!
Hey Chuck thanks for the great video it helped me change mine on my 95 YJ. Quick question though, my Jeep doesn’t have the rubber gasket/grommet that the CPS goes in, it’s just a big gaping hole. Any idea where I can find one? My local auto parts places don’t seem to have them.
Man I got a 93 yj 2.5 Iam having heck trying to figure out the problem!! My jeep idles fine and runs good but very sluggish and seems to flood out if I stop at red light and seems to lose power going up hills top speed I get out of it is 55 mph with 31 inch tires I have put new injectors new tps plugs wires cap checked for vacuum leaks checked fuel rail and so on. When it happens to lose power or flood out and back fire I can turn key off then right back on and Iam ready to go again but still nothing over 55mph. Any ideas ???
+power addicts : I have a 98 wrangler replaced the starter due to having to jump start it while someone tried to start the engine however now that the starter is replaced, battery is replaced as well as ignition replaced still cant seem to find why there is no noise when trying to start the jeep. I am at a stop loss I know the engine works and runs distributor and alternator and battery replaced all within the past 2 years.
Not exactly following you by what you mean be "No noise"? No clicks, no starter turning over?? After replacing all those parts, if the starter isn't kicking in, you may need to check the starter relay.
+Power Addicts - FixJeeps.com - Jeep, car and motorcycle tips . yes no clicks starters not turning over . starter relay assuming that's in the steering column . u even replaced the cables to the starter was leaning towards ecu or cps malfunction
+Power Addicts - FixJeeps.com - Jeep, car and motorcycle tips . the starter relay fuse I looked at it didn't seem blown is there a way to test with a multimeter
You can use the resistance setting across the two poles. If you got no reaction from the meter, Fuse is bad. Easiest thing to do is swap in another fuse then just try. There should be a starter relay also. Im not sure where its located on a '98. Check the owners manual for the relay location.
I have a 94 YJ 4cyl and it's been running really rich lots of fumes, and when you de-excelerate it pops like a pop corn popper. I have replaced the MAP, upper and lower exhaust/oxygen sensors, idle control sensor, all plugs, wires, distributor cap and rotor and little or no difference. Any thoughts? I think it's timing but I'm told you can't change the timing on these?
Please tell me you figured the jeep out? Any luck on this? I have a 4cyl that went from 16 mpg to 8, did the coil, map, all kinds of sensors and tune up.
Hey Quick Question. I have a 91 yj 2.5. It starts great when cold or when hot just after you cut the jeep off, but if you allow the jeep to sit for 15 minutes or so and then try to start the engine, it has to turn over several times before it starts. Can the CPS do this? What do you think causes this scenario? Thank, Love the videos. Keep them coming!
Typically when a CPS goes, its done. I've seen a few cases where the CPS had to cool down and it started working again. Kinda sounds like a fuel pressure issue. Try this .. after the Jeep is hot, turn the key off and let it sit for the 15 minutes. Instead of trying to turning it over. Simply turn the key on and let it sit for about 10 - 15 seconds. If it fires right up, your fuel pressure is bleeding down. Now, the only thing that makes me second guess that is it "should" be hard to start when cold as well if the fuel pressure is bleeding down. Without actually working on it, that kind of a head-scratcher. Thanks, Glad you like the videos!! Have a great day!
Yea your right it makes me wonder why it cranks on the first revolution when cold. Anyway, I will keep working on it and try to update you if I figure it out.
Hi, I have a 93 cherokee with the 2.5 4cyl. Turning over but wont fire...looked through a lot of forum posts and everything seemed to point towards crank position sensor so I ended up at your video. Thing is, I pulled the plugs out and I do have a spark. Any ideas? thanks
+Matt Lavigne Smith Gotta check fuel pressure next. Check the fuel pressure testing video, ua-cam.com/video/knE_J8xc3hk/v-deo.html . Then as a simple test simply push the shrader valve in to see if you get any fuel squirting out. It has to come out with pretty hard force, not just trickle. If you happen to have solid fuel pressure, then possibly a weak coil. Video for that here: ua-cam.com/video/7SM8T1JqTtU/v-deo.html . Thanks for checking out the vids. Hope this help!! Have a great day!
+Power Addicts - Jeep, car and motorcycle tips Fuel pressure seems to be good. I'll test the coil...what I did notice is that the sparks are not a strong blue. Kinda yellowish. Thanks for the advice btw, the videos are great.
You welcome! I Yellow spark is a sigh of a weak coil, low voltage going to the coil or bad ground with the coil. Hope it works out for ya. Glad you like the videos! Have a great day!
1990 wrangler yj 2.5- I checked and I do have a spark. Where do I go next? Jeep overheated, loose hose on radiator leaked fluid. I limped it home as it only overheated close by. Fixed loose hose, replaced fluid and she cranked up fine and sound was very normal. Then she conked out and would not start. When I try to start- she will not engage. Everything is working to try to start, but engine will not engage. The gas pedal makes a humming/kocking sound and moves up twice. Didn't know if this is tied to the culprit. Any suggestions on where to look after find spark in this video would be greatly appreciated, b/c I love my jeep.
It takes 3 things to make an engine run. You said you had spark. You said that it started normally for a bit, so you have fuel and at that point you had compression. The issues you stated: It ran hot .. still drove it while it was running hot. Because you still drove it while it was running hot, the first thing that comes to mind is possibly popped a head gasket. If a head gasket is blown in the right places and bad enough, it can swap compression between cylinders, release the compression into the water jackets, release the compression into the crankcase or any combination of those places. Enough compression loss it may not start, I've seen it happen a couple of times. To check that you will need to test the compression of each cylinder to see if one or more is loosing compression. Unfortunately, I haven't created a video on that yet. I just put it on my video "to-do" list and will do it very soon as its an easy check and you can get the tool from any of the "loan - a - tool" programs at auto parts stores. If its a blown head gasket, it's not really a novice job. But it's not brain surgery either.
I appreciate the reply! I was getting nervous b/c everything was leading down the worst road. So, I tried resetting her computer one more time, but this time I disconnected both positive and negative for an hour and said a lil prayer. She cranked back up just fine and roaring like a mistress on a wedding night! Huge relief Appreciate your videos.
Glad she is going for you! Still kinda of a head scratcher why it did it in the first place. None the less .. glad its rolling again!! Have a great day!!
I just finished doing a motor swap in my 94 jeep yj 4.0 and it has the problem of turning over but not firing up. I checked for spark and all of the wires have spark but its very weak. Could this be a bad crank position sensor?
When a Crank position sensor or Cam position sensor goes you have no spark at all. Both of those sensors job is to tell the computer to fire the coil. The CKPS or CPS goes bad, the computer has no idea when to fire the coil. So .. weak spark .. coil is the first thing I would go for. Fella I used to work with had an old Chevy truck. It would fire but a very weak lazy spark. Changed the coil .. ran like a champ. Hope that helps. Thanks for dropping by :-) Have a great day!
Good point .. doing an engine swap that is a very good possibility. Make a ground cable between the block and body. Another between the battery and body. Check your battery cable at both ends to ensure solid connection, although usually if a battery ground has issues the engine will have a hard time turning over. Remove the coil from the block and make sure there is metal to metal contact between the coil mount and block. You can't have too many grounds.
Do you happen to know if you can put the reluctor ring on at the wrong degree? I just removed my trans to do a rear main seal on my 95 yj 2.5 auto. when I put it back together it wont start. it will crank but wont start. I'm replacing the crank shaft sensor tonight. hopefully that helps but I'm hoping I didn't put the reluctor ring in the wrong position
Very much not likely. The ring is welded to the flywheel/flexplate. There is a specific location on the crank that it gets bolted too so you cant bolt it on in the wrong location. Check the area around the bell housing to make see if a wire may have gotten pinched. I have seen that happed a time or two.
Verify you are getting power to the ECM. If you are getting power to the ECM and have no check engine light at any time. More than likely you have a bad ECM.
Great video. I have a 1997 Jeep Wrangler 2.5L, Automatic. I was getting code 11 doing the key trick. I changed the crankshaft position sensor and notice that mine was installed opposite of your video and on studs with nuts. I assume this is because mine is an automatic, 2.5 L. I have looked at a lot of videos and pictures on line and don't see any that are installed like mine? Do you know anything about this?
+Jonathan Ortiz Hey .. sorry, UA-cam messenger didnt alert me that you sent this. I dont know the exact size. I would just go to the junk yard and snag another or two to have another spare.
Woah buddy!! U know ur shit' my Comanche has been crippled no fire iver a year. i'm old n din't know this computer shit. I wish u had have been here. Thanks. I'm gonna try this stuff.
I've haven't had that happen. But I'd say it could be possible. They aren't too expensive, you could try one. If that doesn't fix it I'd keep it as a spare in the Jeep. There are 2 sensors in a YJ that will leave you stranded. That's the Crankshaft sensor and camshaft sensor. Doesn't hurt to keep spares in the rig.
a power diction I have a 96 Jeep Cherokee I have replaced the cam sensor the coil pack and the crank sensor and I'm still not getting bark at the coal please help
+Steven Fisher After replacing all that, it is going to be a wiring or PCM (Power Control Module) issue. The cam and crank sensor tells the PCM what the engine is doing. The PCM then tells the coil and injectors when to work. So, if you arent getting signal to the PCM due to faulty wiring, the PCM doesn't know what to do, so it does nothing. If the PCM is bad .. well .. it cant do anything. Wish I could have given you a better diagnosis. When the coil has no spark, it is either the cam, crank position sensor, coil, PCM or wiring. Good luck .. have a great day!
92 yj 4.0lt. it turns off while going down the street. then it turns right back on. then off again and on again while driving. but it stays on while in neutral. any ideas??? thanks
Thats kind of a headscratcher. I'd like to say CPS. But the intermittent and then staying running in Neutral leads me toward a wiring issue. Why? When the engine is running it is vibrating. When in neutral there is no or little physical load on the chassis or engine mounts so therefore, less vibration to cause the "possible wire short or break" to act up. Start the engine and leave it idling in neutral (if it is a stick shift, chock the wheels so it doesn't roll). Start at the harness at the CPS, move the harness around by hand to see if it shuts it down. Then go the Camshaft Position Sensor in the distributor and do the same thing. Typically the Crank and Cam sensor are the only two sensors that will shut the engine down completely. After moving the harness and you get no issues, replace the Crank Sensor first, then the Cam sensor. I have seen those come and go intermittently. Hope that helps, but without actually hands on checking it out myself, kinda hard to diagnose. Please drop a line back in here if you discover what the issue is. I'd really like to know for sure myself. Good luck, Thanks for checking out my video! Have a great day!
the jeep is turning over, just put in a new battery. I replaced the crankshaft sensor anyways just to be sure and there is still no spark, along with a new issue of fuel pressure in the fuel rail (I believe that is what it's called). So things I'm looking at are a potential bad camshaft sensor, a potential bad fuel pump, or the ASD kicked in. From my minimal mechanic skills this is what I have been led to.
I get my sensors from the junkyards when I can find them. So to be honest, I haven't tried any of the store bought non-mopar sensors so I can't give an honest answer.
Its a type of hall effect sensor. Chrysler took a standard hall effect and tweaked it to their need. Can't remember exactly what the subtle difference is. Thanks for dropping in! Have a great day!
MINUTE 13:30 .. I AM MISSING THAT RUBBER SEAL/ SPACER WHERE THE SENSOR GOES INTO. I AM TRYING TO GET A REPLACEMENT, DO YOU HAVE ANY ADVICE ON WHERE TO FIND ONE. 1991 JEEP YJ 4.0L AX15 TRANSMISSION I AM LOCATED IN CALIFORNIA. THANKS
hello i have a 19 jeep wrangler and the ignition coil connector is broken . can you help me find that connector and the one for the CPS Connector. or point me in the right direction
Has this tip helped you? Here is a free way to help me. Here is my Amazon influencer page that has many of the parts I've used in videos and some parts that friends have used. www.amazon.com/shop/poweraddicts-fixjeepscom-jeepcarandmotorcycletips?ref=ac_inf_hm_vp . By purchasing through this Amazon page you help me get a small commission of the sale and you do not get charged a cent more. Keep checking back because I update the Amazon page often. Thanks for your support!
Hi from Spain. Could you help me? I just swap the tf999 to ax15 in my old 4.0l 91 YJ and now I don't have sparks in my plugs...I think that the problem is in the CSP, but is new (part number 56027866AB , buy in amazon )... the YJ Works perfect before the swap at morning. what do you think about it? Problem in the CSP, is different the PCM Between auto 4.0 and manual YJ...or anything. THANKS FOR ADVANCE, thanks for the re-clocking template and sorry for my language blunders.
Thank you for another great video. Im going to get you some electrical alligator clips for Christmas. Lol
What year is this Jeep?
W
I will be using this because you definitely helped me!
My 19 yr old son was killed in August when his 2000 Jeep Wrangler hit a deer. He was half way through his Diesel Mechanics Certification. I bought a 2004 Jeep Wrangler & am trying to “twin” his Jeep. I want to try to do most of this mechanical stuff myself or at least try so I make him proud of his momma. I love ur videos...so helpful in all the details. Thank you for sharing ur knowledge!!
😊👍 A year later and I am using your video to help me fix my Wrangler. This the TJ instead of the YJ. Your video saving the day for troubleshooting. We Jeep lovers appreciate you 👍.
Great video it will help a lot of folks!
Just a point of information, a bad crankshaft position sensor will shut the engine down when it's running and will not start when you attempt to start it back up, it shuts down spark. Sometimes it will restart after the engine cools down, but will shut down once the engine warms up again.
A camshaft position sensor will allow the engine to run until you shut it off, and then will not start up again, it shuts down the fuel system.
So if your Jeep shuts down abruptly and won't start back up with no spark, it's most likely a crankshaft position sensor, and if you park your Jeep and the next time you go to start it and it won't start up but you have spark, and the fuel pump doesn't run when you turn the key on, it's most likely a camshaft position sensor that's inside the distributor housing.
Glad you like the video! You also provided very good information! Thanks for adding that to the comments section. Lots of people will find the information useful. Thanks a bunch!! Have a great day!
Wow!!!!!! Great piece of info cause mine wouldn't start again but ran perfect till shut off!!! Saves me the hell of crank position sensor. Many thanks!!!
@@dandahermitseals5582
Never turn your yj off It should run forever. Hire a security team to watch over it while you sleep.
Everytime I shut mine off it won't start again. I learned my lesson.
We are thankful for all your extra kindness during your video's 🎉
Thanks guy. I've got three Jeeps, CJ7, Cheokee, JK Wrangler. I once twisted wrenches on cars and trucks before I did the same on aircraft for 30+ years. I got way behind the power curve going from the newer cars/trucks/Jeeps from turbine engines. Way different technology. Your videos bring me up to this "new" technology for me. Oh yeah. I'm 77 and still cranking.
You go brother!! I hope I'm still cranking at that age. I really enjoy tinkering with Jeeps, Cars & motorcycles. Eventually I'm gonna get another Jeep to do a v8 swap on. Wouldn't making a street rod out of an old CJ5 tub ... hmm .. lol. Thanks for hanging out in my channel!! Glad you like my videos and thanks for taking the time to leave a great comment!
Changed out the crank shaft position sensor on my 01 Wrangler,due to my jeep shutting off while driving, and now I have no issues whatsoever. Thanks for the clip.
Very thorough ! That’s why they call it painstakingly ! You took the pain out of It for the viewer , you went the extra mile on explanation AND example , thx for your diligence .
I'm not one to post comments but my YJ broke down at work at midnight while i was parked in somebody's spot. Felt like an ass but did my research and it was the cps. Thanks to you i changed it out in like 2 minutes flat and got my jeep on the road again. Liked and subscribed.
Glad the video helped you!! Thank for "Liking the video and subscribing!! Have a great day!
Have been given a 01 TJ. The only problem is that it will cut off. Looking around the Wrangler boards and see " crankshaft position sensor ". Brought me to your page, and love it! So straight forward. Subbed, and liked. Hope this fixes my issue. Thank you!
There are 2 sensors that will prevent them from starting. Crankshaft position sensor and camshaft position sensor. If I understand what you are describing as it just randomly shutting off, that is typically the crankshaft position sensor. Good luck, hope you get it fixed!! Have a great day!
It was the crankshaft sensor. Learned how to pull the code, and it was the p0320 code. ALL is well. Thank you again!
Glad you got it! You're welcome. Have a great day!
Thank you so much for helping us with your videos. I had about a month with my Jeep broken and now thanks to you is fixed.
Thats why I create the videos! To help people repair their own Jeeps to save money and the great satisfaction of knowing you did it yourself! Thanks for taking the time to leave an awesome comment! Have a great day!!
This guy KNOWS what he is talking about and this is greatly appreciated! Thank for being human!
Thanks!! Glad you liked the video. Hope it helps!! Have a great day!!
Thanks for the video! I know I have a neutral safety switch problem and now I got a code for this sensor. My jeep has the sxs of not turning over and stalling and will only attempt to turn over in neutral. My reverse lights are not working I think that is related to the neutral safety switch. Anyway I will now try to replace this sensor and see what happens. Thanks for the video. Filming and directions seem great. I love the seasoned mechanic pointers!
Watched several videos on the sensor, this is by far the best I have seen. Thank you for sharing.
You are welcome! Glad the video helped!
Thanks for the informative vid. I just bought a jeep that isn't starting... now i know where to begin!
You are welcome! Hope this helps get you rolling again! Thanks for taking the time to leave a comment :-) Have a great day!
one of the best how to videos I have ever seen . ready to tackle CSP on my 86 Cherokee.
Thanks .. glad you liked it! Hope the CPS changeout goes well for you! Thanks for checking out the video and thanks for taking the time to leave a great comment. Have a great day!
Jeep left me know the side of the road last week got the code and brought me here. Thanks for all the information! learned a lot! 👍👍
You are welcome! I carry an extra crank sensor with me at all times. They don't go out often. But there are 2 sensors that will leave you stranded. The crank position sensor and the cam position sensor. All the other sensors can make it run bad, but they will usually get you home. Glad the video helped you! Thanks for taking the time to leave an awesome comment! Have a great day!!
Very good, thanks for your help 👍 I have a '95 Jeep Wrangler that doesn't want to start because the crankshaft position sensor is not good, but now I know where and how to check it up
David Menjivar Glad the video helped you and you are very welcome! Thanks for taking the time to leave a great comment and have a great day!!
Damn glad I found this vid. He's right, this plug was replaced in later years & it's hard to find diagrams or vids on if you roll XJs. They're all on the oval plug. I guessed correctly what ABC were as I'm sure most woulda but you confirmed it. Oo, & thanks for the tip on the paper spacer on XJs , that woulda sucked. Just wish you woulda mentioned which letter corresponded with reference, ground, & output. Easily cross referenced with those fore mentioned diagrams though. Thanks Power Addicts, saved my DD rig
You're welcome! Glad the video helped you! I was thinking that I put a diagram on the website:www.fixjeeps.com/crankshaft-position-sensor.html . I looked and sure didn't. I gotta get one on there to make it complete. Thanks for pointing that out! Glad your XJ is rolling. Thanks for taking the time to leave a great comment! Have a great day!!
I'm confused - the video shows the round plug & you are testing across B & C - then you say that the round was replaced with a flat plug - A B C - then you say "you want the 2 outside poles" - does that mean test A & C on the flat plug? also, what is the 3rd pole? is it the power supply? & what voltage should it be?
Im new to jeeps, so always a good thing to have a buddy who knows....i have bought 2 cherokee and 2 wrangler with 4.0l just love them old things.all 90 s, so want them back on the road(or trails)..your vids are very well done and apreciated....from canada
Thanks!! Glad you like the vids. I know where a ZJ is for cheap, I've thought about buying it to wheel and beat on. But I already got too many toys as it is ...
Great video it really helped. here's a tip I did ,tie a string on sensor when you pull it up to the connector. when you install new sensor tie string to connector and pull it up.
+Anthony Barringer
Yep .. that would actually help! Thanks for a great tip! Have a great day!
When he tests the CPS in ohms and says it should have no resistance, the meter shows 1, and no resistance should show 0.0
When I bought a new CPS for my 4.0, it read 0.0 ohms, same as the one I removed after viewing this video. It turned out not to be the CPS but my Coil that gave me a false reading looking good, when I tested it, before researching additional reasons for the no-spark and found this video.
The video did give some really good advice to be careful not dropping the CPS bolts in to the Bellhousing.
No, Actually there is no fault in the video. The reading is correct. If you were watching the meter it stays at "1" all the time with the leads "not touching" anything. When I touch the leads together it then went to almost 0, just measuring the resistance of the leads themselves. What I was saying in the video, there should be no change at all in the meter reading and there wasn't. The display in the meter never changed as it shouldn't when reading across pins B and C. I'm reading and quoting this straight from the Chrysler service manual as I type this ... "Place an ohm meter across terminals B and C. The meter reading should be open (no resistance). Replace sensor if a low resistance is indicated". The part where is says "The meter reading should be open" means an open circuit, as in, there should be NO change in the meters reading and again, there wasn't. Yes, I've measured sensors after releasing this video that also read 0.0 and the sensor still worked. But technically, the meter should read the sensor just like it is when its turned on with the leads touching nothing.
This video will soon be 3 years old. That Crank sensor is the same sensor I'm still running today. No issues with the sensor or the video.
Coils can be finicky testing them. Sometimes it depends on whether the coil is hot, warm or cold as to if it test good or bad. Crank position sensors can be tricky as well to diagnose. About 95% of the time when a crank sensor fails .. its done and not coming back to life. I know of a Cherokee that has had 2 Crank sensors changed out. Each time when the engine cooled it would start up and run till the engine got hot ... then .. fall on its face again. Testing the Crank sensor after the engine cooled enough to touch, it tested good be cause is was cooled down. The symptoms at this point says that the coil could be the issue. Tested the coil, it tested good because it had cooled down. Swapped in a known good coil, still fell on its face after getting hot. Swapped in another Crank sensor ran for over a year trouble free. When it acted up again showing the same symptoms, we swapped a crank sensor in a all was good again.
Glad you got your ride going! Have a great day :-)
I just viewed your video tonight and found it to be of great help and of course I also signed up. Thanks for all the information and the way you put it out, very easy to understand too. I just acquired a non-running 91 Laredo, 4.0L, with the AW4 from a family member who couldn't get it started after last driving it a year ago. He put in a new fuel pump and the injectors are getting fuel. He put in new plugs and told me it was getting spark. I've recently installed a new N.S.S. safety switch and it cranks over in park and neutral, but no start. I will be checking out the CPS in the morning to see if its good, but based on all my reading and viewing, I think it might be the CPS or Coil. Manny Thanks. Tio AL.
Hello, so I just bought a yj Jeep and it ran great for about two months , now it wants to die when you put it in great , but idles good, it’s standard by the way , I’d really like your in put please, your videos are great I like how you explain step by step, thanks,Kellie
Thanks for the great video, and giving information that a country boy can actually understand. I too am a life long mechanic, but new to the jeep world. 99 TJ .now to go test my CPS. Will be shopping the Amazon site. Keep those videos coming
Thank you for showing me exactly how the sensor looks on the transmission because you had motor out and you see this perfect.
Thank you
Glad it helped!! You are welcome!
Thank you so much!!! The most comprehensive video on this subject with great tips and explanations, Plus the guy is cool!!!
If the bolt falls in the hole then you can remove a steel plate on the bottom of the bell housing and fish it out from there, you don't have to separate the transmission from the engine.
That is true. The throw out bearing went out in my Dad's TJ. We pushed that plate back a bit and ball bearing came rolling out.
Excellent video. Thank you for the great tip on placing the sensor first.
You are very welcome. Glad it was helpful!
Awesome video! I've purchased quite a bit of diagnostic equipment to identify the problem with my '97 Grand Cherokee. I don't mind because I've learned a lot about my Jeep. Plus new coil, cap, rotor, and cam position sensor (which I thought was a condenser!) have been installed. I'll test the crankshaft position sensor in the morning. I saw a sight that I should use Mopar only. Have you found success with other manufacturers of Crankshaft Position Sensors?
Thanks for the help. Been chasing an intermittent issue for a couple months (stalling, no start when jot etc). Hopefully the new one straightens it out.
Thanks for this video. I have a 1988 Cherokee that the crankshaft position sensor wire hit the exhaust manifold & melted. I barely got it home. I put a new one in, but it would turn over but no spark. I checked the new sensor with an ohm meter & I'm getting a reading on the meter it's not showing an open circuit. I'm hoping that after I replace the sensor again I can get it to start. Thanks.
What would you suggest to do if the "CSPS" Pigtails are damaged as well as the CSPS?
Question everything I’ve read on the forums is saying 200 ohms of resistance is normal, but I bought a cps from Oreillys and it had about the same Resistance as the one I took out but the Jeep wouldn’t start at all with the new one but still will with the old one, so had them order me another one lol I’m at a loss tho 1990 Jeep Wrangler 2.5 TBI
Hey Drew! - I'm new to Jeep World having recently inherited a '90 Cherokee. I'm a mechanic wanna' be and (sure enough!) when doing my first Jeep tune-up managed to twist off the hold down screw on the distributor cap. SO....if there are any great tips on how to get the distributor back in CORRECTLY the 1st time , that'd be great. The vehicle runs but idles roughly after warm up. I heard a read a MILLION reasons why but have resolved to replacing each component that could be the culprit until I get it right. Don't know what else to do! The next potential culprit is CPS. and NOW, after watching your vid, I have a clue what I am doing AND WHY!!!The WHY is a big deal with me. When I "get" why it works or doesn't I seem more confident in what I am doing.
Anyway, Thanks for taking time to 'splain stuff to us old "new" Jeep guys, keep up the good work, Man, you ARE appreciated!
+Bill Evans Thats without a doubt one video I need to do. Kinda hard to explain without showing it. Basically get number 1 cylinder on top of compression stroke (not exhaust stroke). Drop the distributor in so the the rotor button is pointing at number one cylinder. That will get you in the ball park. The rest is using a timing light to set the engine to factory timing spec by the harmonic balancer. Just a note, if the CPS was bad, it wouldn't rut at all. If it did it may run for a short time then shut down. I think the HOW isnt complete until the WHY is put with it. I naturally over analyze everything. I'm not satisfied with a half way explanation. That tends to show in my videos. I get flamed occasionally for my video being too long. Thats fine, haters will be haters. I get more praise for over explaining than negative. So .. I'm doing all right :-). So with that being said.. Thanks for the great review! That keeps me reassured that Im doing the right thing. Have a great day!
Excellent video assist for troubleshooting not able to start. Thank you.
Great video and explanation of a problem I had with my 97 TJ.
I hope you still have your TJ. It will be very interesting when the infamous, "No Bus," error comes up. After 415,000 miles on my aging TJ, the infamous, "No Bus," came for a visit. My computer is a mess. I jumped the fuel pump and the injectors and I am driving my TJ until I can get a computer. But it is not very pretty when the engine is cold. When thed engine is warm, you would neved guess there is something wrong.
Thanks ,my friend has a 95, this is going to get us started 😎
Good luck and have fun!
Crank but no start for my 92 XJ was the Auto-Shutdown relay.
I've had that happen before. It was strange, I had just moved the Jeep to a different spot in the driveway. I get in it a few minutes later and crank but no start. I was like "what the heck is going on!" I swapped the relay and was good to go! Thanks for dropping in a great suggestion for others to try! Have a great day!
@@Poweraddicts what going wrong
You make sharing the knowledge fun man. Keep on jeeping
Thanks!! I try to make them entertaining as well as educational. Thanks for checking out the video and taking the time to leave an awesome comment! Have a great day!
Always, on the mark with keeping the jeep running..
great video. trying to keep my cherokee running.you don,t by anychance have the bolt sizes for the bell housing to engine on a 94 xj with a 4.0 and an automatic .sure would appreciate the length and size. i think there is 3 differant sizes.
Great Video, Just one question... No Spark usually means Bad Coil.. How come you didn't test the Coil For Spark first before Blaming the CPS ? Does the CPS in fact make the Coil Work?
On Jeeps (Wranglers and Cherokees) of this generation, the CPS "usually" goes out before the coil. But obviously not every time. Yes, if the CPS fails, the coil stops firing. Good question .. thanks for asking! Have a great day!
If your crankshaft sensor is bad would your Jeep start up at all? And if it would start up will it cause your Jeep to cut out while your driving? It’s the only code my Jeep is throwing?
Hey Man thank for posting this video. I am in the process of rebuilding a 1991 jeep YJ. I have a problem no one else has though. My connector from the wiring harness has been on the exhaust manifold and is burnt to no recognition. I want to direct wire it to the CPS wiring but I dont know what color wire goes to the CPS wiring. Do you have a diagram of what color wire goes to the correct pin of the wiring harness connector? I can figure out what I need if I only knew which one of the 3 wires from the wiring harness goes to the correct pin. Hope this makes sense.
+Paul Roberts Yep .. it makes total sense. I'll look this weekend at the color codes. During the week I pull long hours. But, if you gently take a razor blade and cut off the burnt insulation to separate the copper parts of the wires. The copper part of the wires should at least allow you to see where they are going well enough to rewire. I've done that many many times.
+Power Addicts - Jeep, car and motorcycle tips Thanks for that input but my connector was badly burned and the wire connections were broken. I guess I could do trial and error method but it would be nice to know which one of the 3 wires go to the corresponding pin. I cant find a diagram of this anywhere.
I've got an extra sensor in my YJ tool box. I'll try to remember to look tomorrow.
Thanks for your help.
The wiring diagrams I've looked at are crap! LOL .. Does yours have the round (like in the video) or oval shaped plug?
I have spark , fuel and air. I was told to replace the crankshaft position sensor.
You rock! Fellow Tennessee brother
Thanks! Glad you enjoyed the vid!
While testing my crank sensor, I don't get any change at 200 Ohms but the meter jumps when I have it set to 2000 ohms. Does it matter that it doesn't move at 200 but moves at 2000?
I’m thankful for your videos and advice. God bless!!
I have the strangest problem, I believe that the cps won't work when it's cold. No spark, but later in the day when it warms up it starts. Have you heard of this before?
As strange as it sounds, I can see that happening. I've seen a few times as to when a CPS is going bad it would shut down when it got hot, then start back up once it cooled off. They aren't crazy expensive, change it out see what happens. Good luck and thanks for checking out the video. Have a great day!
Checked TP ok checked MAP ok checked CSP bad. Ok bought a new one, checked before I put it on ok. Put on new CPS, no spark. Checked new installed tested bad . Thanks any help. Doug
Thanks. Helped me a lot man! Need more folks doing the same.
You're welcome! Glad it helped! Thanks for checking out the video and taking the time to leave a great comment! Have a great day!
Great video and info. Did you ever had a situation where the ring is rusted and the CPS is not picking up the correct crankshaft position?
Nope, I haven't personally ran into that. But, if thats the case, there is no choice other than to replace the flywheel.
Did not want to hear that, I was hopping I could clean it and leave the lower cover plate opened to dry it out. Thank you.
Thank you !! I really appreciate your videos. They had helped me a lot.
You are very welcome! I'm glad the video help you. Thanks for taking the time to leave an awesome comment!
Excellent Video. Lots of good information here!
You are awesome!! Very well done. Thanks for your little tips, they are life savers!
You are welcome and thanks for the great comment! Have a great day!
Will a bad crank shaft position sensor cause no voltage at the coil?
I love this video, sure did help me out. Thank you very much. Keep the videos coming.
You are welcome!! Glad it helped! Thanks for taking the time to leave a great comment! Have a great day!
This is the most southern thing I’ve seen all week
👍😀
So if I do it like you did it on the sensor I get no reading. But if I measure pole
B and c with the negative on b and positive on c I get a reading. Why do I not get a reading with positive on b and negative on c?
hello could you send me ckp conector pinout ? ,in my cherokee was cut off and i can´t find it
Great video, thank you for your time sir and the great tip on reinstalling
You are welcome :-) Thanks for taking the time to leave a great comment! Have a great day!
Thanks for your videos. Replaced my crankshaft position sensor and coil, still no spark off coil lead. Any suggestions?
Also replaced ECU. Will the distributor pickup sensor cause the coil to not spark?
+Drew bandhauer - Hey Drew, you dont have the "reply" link under your comment. I use the parts store sensors. I typically don't by the cheapest thing they have. Whatever has the best warranty. I do favor Bosch parts when I can get them. Thanks for checking out the video and taking the time to leave a great comment! Have a great day!
I only have 2 wires on CSP and both leads have 3.5 volts,
Hey Chuck thanks for the great video it helped me change mine on my 95 YJ. Quick question though, my Jeep doesn’t have the rubber gasket/grommet that the CPS goes in, it’s just a big gaping hole. Any idea where I can find one? My local auto parts places don’t seem to have them.
Never mind found one at Quadratec, but still thanks for the great videos!
I was gonna say Quadratec or junkyard. You are welcome! Glad the videos help!! Have a great day!
great video....thank you for taking the time to do this for us!
Thanks Tennessee, Great video! Saved me a lot of time and aggravation.
You are welcome!! Glad it helped! Thanks for taking the time to leave a great comment!!
Man I got a 93 yj 2.5 Iam having heck trying to figure out the problem!! My jeep idles fine and runs good but very sluggish and seems to flood out if I stop at red light and seems to lose power going up hills top speed I get out of it is 55 mph with 31 inch tires I have put new injectors new tps plugs wires cap checked for vacuum leaks checked fuel rail and so on. When it happens to lose power or flood out and back fire I can turn key off then right back on and Iam ready to go again but still nothing over 55mph. Any ideas ???
What will I do if you close your channel?
Thanks for putting this stuff up!
+power addicts : I have a 98 wrangler replaced the starter due to having to jump start it while someone tried to start the engine however now that the starter is replaced, battery is replaced as well as ignition replaced still cant seem to find why there is no noise when trying to start the jeep. I am at a stop loss I know the engine works and runs distributor and alternator and battery replaced all within the past 2 years.
Not exactly following you by what you mean be "No noise"? No clicks, no starter turning over?? After replacing all those parts, if the starter isn't kicking in, you may need to check the starter relay.
+Power Addicts - FixJeeps.com - Jeep, car and motorcycle tips . yes no clicks starters not turning over . starter relay assuming that's in the steering column . u even replaced the cables to the starter was leaning towards ecu or cps malfunction
+Power Addicts - FixJeeps.com - Jeep, car and motorcycle tips . the starter relay fuse I looked at it didn't seem blown is there a way to test with a multimeter
You can use the resistance setting across the two poles. If you got no reaction from the meter, Fuse is bad. Easiest thing to do is swap in another fuse then just try. There should be a starter relay also. Im not sure where its located on a '98. Check the owners manual for the relay location.
I have a 94 YJ 4cyl and it's been running really rich lots of fumes, and when you de-excelerate it pops like a pop corn popper. I have replaced the MAP, upper and lower exhaust/oxygen sensors, idle control sensor, all plugs, wires, distributor cap and rotor and little or no difference. Any thoughts? I think it's timing but I'm told you can't change the timing on these?
Please tell me you figured the jeep out? Any luck on this? I have a 4cyl that went from 16 mpg to 8, did the coil, map, all kinds of sensors and tune up.
Hey Quick Question. I have a 91 yj 2.5. It starts great when cold or when hot just after you cut the jeep off, but if you allow the jeep to sit for 15 minutes or so and then try to start the engine, it has to turn over several times before it starts. Can the CPS do this? What do you think causes this scenario? Thank, Love the videos. Keep them coming!
Typically when a CPS goes, its done. I've seen a few cases where the CPS had to cool down and it started working again. Kinda sounds like a fuel pressure issue. Try this .. after the Jeep is hot, turn the key off and let it sit for the 15 minutes. Instead of trying to turning it over. Simply turn the key on and let it sit for about 10 - 15 seconds. If it fires right up, your fuel pressure is bleeding down. Now, the only thing that makes me second guess that is it "should" be hard to start when cold as well if the fuel pressure is bleeding down. Without actually working on it, that kind of a head-scratcher. Thanks, Glad you like the videos!! Have a great day!
Thank you for your reply. I will try that.
Yea your right it makes me wonder why it cranks on the first revolution when cold. Anyway, I will keep working on it and try to update you if I figure it out.
Yea .. please do update. I'm rather curious myself. It would also help others who read this as well. Thanks!! I subbed to your channel.
Thank You!
Hi, I have a 93 cherokee with the 2.5 4cyl. Turning over but wont fire...looked through a lot of forum posts and everything seemed to point towards crank position sensor so I ended up at your video. Thing is, I pulled the plugs out and I do have a spark. Any ideas?
thanks
+Matt Lavigne Smith Gotta check fuel pressure next. Check the fuel pressure testing video, ua-cam.com/video/knE_J8xc3hk/v-deo.html . Then as a simple test simply push the shrader valve in to see if you get any fuel squirting out. It has to come out with pretty hard force, not just trickle. If you happen to have solid fuel pressure, then possibly a weak coil. Video for that here: ua-cam.com/video/7SM8T1JqTtU/v-deo.html . Thanks for checking out the vids. Hope this help!! Have a great day!
+Power Addicts - Jeep, car and motorcycle tips Fuel pressure seems to be good. I'll test the coil...what I did notice is that the sparks are not a strong blue. Kinda yellowish. Thanks for the advice btw, the videos are great.
You welcome! I Yellow spark is a sigh of a weak coil, low voltage going to the coil or bad ground with the coil. Hope it works out for ya. Glad you like the videos! Have a great day!
Haven't found the video yet, but how would you test the camshaft position sensor?
I haven't created that video yet. I need to get that one done so that will have all the engine sensors covered.
1990 wrangler yj 2.5- I checked and I do have a spark. Where do I go next? Jeep overheated, loose hose on radiator leaked fluid. I limped it home as it only overheated close by. Fixed loose hose, replaced fluid and she cranked up fine and sound was very normal. Then she conked out and would not start. When I try to start- she will not engage. Everything is working to try to start, but engine will not engage. The gas pedal makes a humming/kocking sound and moves up twice. Didn't know if this is tied to the culprit. Any suggestions on where to look after find spark in this video would be greatly appreciated, b/c I love my jeep.
It takes 3 things to make an engine run. You said you had spark. You said that it started normally for a bit, so you have fuel and at that point you had compression.
The issues you stated: It ran hot .. still drove it while it was running hot.
Because you still drove it while it was running hot, the first thing that comes to mind is possibly popped a head gasket. If a head gasket is blown in the right places and bad enough, it can swap compression between cylinders, release the compression into the water jackets, release the compression into the crankcase or any combination of those places. Enough compression loss it may not start, I've seen it happen a couple of times. To check that you will need to test the compression of each cylinder to see if one or more is loosing compression. Unfortunately, I haven't created a video on that yet. I just put it on my video "to-do" list and will do it very soon as its an easy check and you can get the tool from any of the "loan - a - tool" programs at auto parts stores. If its a blown head gasket, it's not really a novice job. But it's not brain surgery either.
I appreciate the reply! I was getting nervous b/c everything was leading down the worst road. So, I tried resetting her computer one more time, but this time I disconnected both positive and negative for an hour and said a lil prayer. She cranked back up just fine and roaring like a mistress on a wedding night! Huge relief Appreciate your videos.
Glad she is going for you! Still kinda of a head scratcher why it did it in the first place. None the less .. glad its rolling again!! Have a great day!!
I just finished doing a motor swap in my 94 jeep yj 4.0 and it has the problem of turning over but not firing up. I checked for spark and all of the wires have spark but its very weak. Could this be a bad crank position sensor?
When a Crank position sensor or Cam position sensor goes you have no spark at all. Both of those sensors job is to tell the computer to fire the coil. The CKPS or CPS goes bad, the computer has no idea when to fire the coil. So .. weak spark .. coil is the first thing I would go for. Fella I used to work with had an old Chevy truck. It would fire but a very weak lazy spark. Changed the coil .. ran like a champ. Hope that helps. Thanks for dropping by :-) Have a great day!
Power Addicts - Jeep, car and motorcycle tips I already replaced the coil and had no luck.. Do you think it could be a bad motor ground?
Good point .. doing an engine swap that is a very good possibility. Make a ground cable between the block and body. Another between the battery and body. Check your battery cable at both ends to ensure solid connection, although usually if a battery ground has issues the engine will have a hard time turning over. Remove the coil from the block and make sure there is metal to metal contact between the coil mount and block. You can't have too many grounds.
Do you happen to know if you can put the reluctor ring on at the wrong degree? I just removed my trans to do a rear main seal on my 95 yj 2.5 auto. when I put it back together it wont start. it will crank but wont start. I'm replacing the crank shaft sensor tonight. hopefully that helps but I'm hoping I didn't put the reluctor ring in the wrong position
Very much not likely. The ring is welded to the flywheel/flexplate. There is a specific location on the crank that it gets bolted too so you cant bolt it on in the wrong location. Check the area around the bell housing to make see if a wire may have gotten pinched. I have seen that happed a time or two.
I replaced the crank position sensor and got it running yesterday. Thanks for getting back to me.
If I'm not having my check engine light come on when I'm cranking, is that my ECM or could it be my crankshaft position sensor? Thanks so much
Verify you are getting power to the ECM. If you are getting power to the ECM and have no check engine light at any time. More than likely you have a bad ECM.
Have an important question the valve cover gasket do you have to use loctite on those bolts
Nope .. no loctite.
Great video. I have a 1997 Jeep Wrangler 2.5L, Automatic. I was getting code 11 doing the key trick. I changed the crankshaft position sensor and notice that mine was installed opposite of your video and on studs with nuts. I assume this is because mine is an automatic, 2.5 L. I have looked at a lot of videos and pictures on line and don't see any that are installed like mine? Do you know anything about this?
Being that yours is a 97, you have a TJ which is a newer engine generation than the YJs like mine.
Is 2.5 l in the same place?
Hey man, I hate to be a bother but do you know the size of the top he bolt? I lost mine!HELP!
+Jonathan Ortiz
Hey .. sorry, UA-cam messenger didnt alert me that you sent this. I dont know the exact size. I would just go to the junk yard and snag another or two to have another spare.
Woah buddy!! U know ur shit' my Comanche has been crippled no fire iver a year. i'm old n din't know this computer shit. I wish u had have been here. Thanks. I'm gonna try this stuff.
How much would it cost to have a mechanic do this job if i buy the part?
Even though its an easy swap, I'd say probably around $75 - $100 for dealership prices. Most shops bill out $75+ an hour.
can the sensor still be bad if i don't read anything on
my meter?
I've haven't had that happen. But I'd say it could be possible. They aren't too expensive, you could try one. If that doesn't fix it I'd keep it as a spare in the Jeep. There are 2 sensors in a YJ that will leave you stranded. That's the Crankshaft sensor and camshaft sensor. Doesn't hurt to keep spares in the rig.
a power diction I have a 96 Jeep Cherokee I have replaced the cam sensor the coil pack and the crank sensor and I'm still not getting bark at the coal please help
+Steven Fisher After replacing all that, it is going to be a wiring or PCM (Power Control Module) issue. The cam and crank sensor tells the PCM what the engine is doing. The PCM then tells the coil and injectors when to work. So, if you arent getting signal to the PCM due to faulty wiring, the PCM doesn't know what to do, so it does nothing. If the PCM is bad .. well .. it cant do anything. Wish I could have given you a better diagnosis. When the coil has no spark, it is either the cam, crank position sensor, coil, PCM or wiring. Good luck .. have a great day!
92 yj 4.0lt. it turns off while going down the street. then it turns right back on. then off again and on again while driving. but it stays on while in neutral. any ideas??? thanks
Thats kind of a headscratcher. I'd like to say CPS. But the intermittent and then staying running in Neutral leads me toward a wiring issue. Why? When the engine is running it is vibrating. When in neutral there is no or little physical load on the chassis or engine mounts so therefore, less vibration to cause the "possible wire short or break" to act up. Start the engine and leave it idling in neutral (if it is a stick shift, chock the wheels so it doesn't roll). Start at the harness at the CPS, move the harness around by hand to see if it shuts it down. Then go the Camshaft Position Sensor in the distributor and do the same thing. Typically the Crank and Cam sensor are the only two sensors that will shut the engine down completely. After moving the harness and you get no issues, replace the Crank Sensor first, then the Cam sensor. I have seen those come and go intermittently. Hope that helps, but without actually hands on checking it out myself, kinda hard to diagnose. Please drop a line back in here if you discover what the issue is. I'd really like to know for sure myself. Good luck, Thanks for checking out my video! Have a great day!
Very informative. Thank you!
You are welcome! Hope it helped.
After performing this, my crankshaft position sensor is fine, I can't find your follow up video on the camshaft sensor. Is there one available?
Thats the one sensor video I havent created yet. Sorry. I'm moving the video to the ASAP list. Whats the Jeep doing?
the jeep is turning over, just put in a new battery. I replaced the crankshaft sensor anyways just to be sure and there is still no spark, along with a new issue of fuel pressure in the fuel rail (I believe that is what it's called). So things I'm looking at are a potential bad camshaft sensor, a potential bad fuel pump, or the ASD kicked in. From my minimal mechanic skills this is what I have been led to.
Also, have you had success with non Mopar replacement parts? Just curious as they are way expensive...
I get my sensors from the junkyards when I can find them. So to be honest, I haven't tried any of the store bought non-mopar sensors so I can't give an honest answer.
Is this a hall effect sensor? If so looking up info. on one could show how to check it out.
Its a type of hall effect sensor. Chrysler took a standard hall effect and tweaked it to their need. Can't remember exactly what the subtle difference is. Thanks for dropping in! Have a great day!
have a 1993 jeep yj 4.0 have fier to spark plugs will not start fuel to the injer. crank shaft sencor test ok have any ideas for me
+Greg Reavis Check the fuel pressure to make sure the fuel pump didnt quit on ya. Good luck! Have a great day!
Doing that today thanks let you know
Did this test, sensor showed good. Jeep wouldn't start, replaced sensor anyway jeep started . Test isn't always right
having a issue. low rpm and almost stalling only in reverse. 94 wrangler 4.0 auto. any ideas?
Throttle position sensor would be the first thing I would check. Here is my video for that: ua-cam.com/video/URNYaGXM_uQ/v-deo.html
Ended up the trans needed a rebuild. Now 2 years later. OEM cps failed. Lol its a yj thing
Thank you!
You just save my day. 👍🏻 kudos to you.
You welcome! Glad the video helped you. Thanks for taking the time to leave a great comment! Have a great day :-)
MINUTE 13:30 .. I AM MISSING THAT RUBBER SEAL/ SPACER WHERE THE SENSOR GOES INTO. I AM TRYING TO GET A REPLACEMENT, DO YOU HAVE ANY ADVICE ON WHERE TO FIND ONE.
1991 JEEP YJ
4.0L
AX15 TRANSMISSION
I AM LOCATED IN CALIFORNIA.
THANKS
Go to a Junk yard and get one from a XJ or ZJ Cherokees
Real good advice!!
+Tom OConnor
Thanks! Have a great day!
Thanks for sharing...very helpful
hello i have a 19 jeep wrangler and the ignition coil connector is broken . can you help me find that connector and the one for the CPS Connector. or point me in the right direction
Most Jeep Cherokee XJs have very similar connectors. You may could go to a junk yard and find what you need.