This video was taken from a 5 part training series I did for my students on various ways to identify a misfire and restricted exhaust testing. You can find this 5 part series here www.scannerdanner.com/scannerdanner-premium-chapters/misfire-case-studies.html
Thanks for the great info! I have a injector wiring issue on my 2007 jeep wrangler. I have a cylinder #4 misfire. Its reading 14.0 -14.1 only on #4 cylinder. 1,2 3,5 and 6 injectors read 13.6 -13.8 and never reach 14.0. Where could my problem be?
Do you know of a great mechanic in the 92336 zip code area. I am in Southern California. I have a 2000 Ford mustang v6 with a crank no start, no spark. I have checked about everything, I think, and I am thinking it probably something simple that I am missing. Any help appreciated ¹
@@victorrodriguez2158 I have a few shops using my training in southern California. Check out our shop directory www.scannerdanner.com/find-sd-shops.html
Thanks I just found out what the problem was thanks to your video on crankshaft sensor. I was getting no spark on ignition coil pack but did have voltage on the connector. So checked voltage on the fuel injector with a light probe. The control side was no lighting the probe when I cranked the engine. So I checked the crankshaft sensor by the harmonic balancer. As I was checking the connection, I noticed the teeth weren't underneath the crankshaft sensor and the belt seemed off. After further inspecting the harmonic balancer I notice it was coming out which got the teeth to not be underneath the crankshaft sensor. The bolt holding the harmonic balancer had broken off and balancer was coming off.
I have been a mechanic for over 13 years now. I just want to say thank you because your videos have taught me a lot more than what I thought I know. You are a beast and probably one the best diagnostics people out here I would consider. Keep up the good work and we appreciate the videos.
ScannerDanner you are the man! Super appreciate your tutorials for the common dude to use basic tools. I was able to use my multi-meter and trouble light to trace a bad #7 open, just by watching your video. Saved myself a boatload!!!! Thank you so much.
Great video on a simple open. This is the kind of stuff that takes maintenance skills to the next level separating the real wrenches from the parts changers. If you want to be a great mechanic who has families sending everyone they know to you and their kids and so on....Be like Paul Danner. He fixed this cat's ride for a fraction of the cost of the computer swap the guy before him did. This customer will be back again for honest service. Paul, keep up the great work, you are setting the example and helping make a good name for the trade.
Awesome instructional video, thank you for making it and sharing it. I had just completed the dreaded plenum plate and gasket repair on a Dodge 5.2, along with numerous other repairs and replacements while in there. I had one cracked fuel injector, so I bought a new one to replace it. It was a BWD (Borg Warner). Got everything put back together, and it was running like complete shit, bad idle, wanting do die, missing, etc. The computer finally kicked a code, P0208, which was the same cylinder that had the brand new injector. Found this video doing research, planning for the worst, even a possible broken valve spring. Well I checked the resistance on that injector, and there was none. Brand new, non working injector. Just replaced it and my truck is running the best it has since I've owned it! Lesson to be learned, don't ever count on brand new parts to be in working condition! Anyways, thanks again for the video!
Thank you for doing this kinda stuff with the basic tools. I'm still building my Diagnostic Arsenal and watching your videos really showed me how valuable having a Scope and more importantly having the knowledge on how to use it properly can help diagnose problems correctly. But Until I get the ability to buy one. Seeing that there are a lot of good things that can be done with just a plan ole multi meter and Test light is SUPER helpful.
Great video Paul as always. Not being a professional it is really helpful to see these basic tests performed. Thank you for sharing your vast experience and knowledge on this and your premium channel which I have to say offers unbeatable value for money having watched the contents. I never stop learning something new.
Paul, thanks for showing that, it is good info. Perhaps you should have explained how the injector circuits work, as i think that not many do understand. I'm a Chrysler dealer tech, and the way Chrysler designed their systems, the injectors get 12v all the time, the pcm turns the ground on/off to turn the injectors on/off. I don't know atm how all the other manufacturers design their injector circuits, but wanted to point that out in the event that there are different designs.
Wanted to thank you for your fathers service in Vietnam. Read in the comments . I am very proud of him and the amazing son he raised . God bless you brother
I continue to say it..you rock.. love the way you analyze things.. and at that with simple tools ..thank you for always throwing little freebies every now and then our way ..
To the guys that are busting my man about his 454 small block, where is your videos on youtube??? G M made a 265, 283, 327, 305, 350, 302, and a 400 small block. But that was before your time. This young man took his time to make a very informative video and you know-it-alls kick him just for your own lack of self respect. Bless your hearts.
I'd use the term 'technician' lightly to describe the other guy. Why is it that customers need to constantly pay for incompetencies and skill inadequacies of service people ? Patient is describing a heartburn sensation? ; lets put him on the heart transplant recipient list. crazy dude, you're a breath of fresh air to the world of automotive diagnostics. Keep it up.
THE POST IS PRETTY OLD, BUT I REALLY THANKFUL FOR YOUR DEDICATION SPENDING YOUR TIME AND KNOWLEDGE TO HELP OTHERS. I LEARNED TO DO SOME WORK ON MY CARS BECAUSE OF SOME PEOPLE TO RIP OTHERS
Thank you. I’m not a mechanic or tech not even close. I used your video to learn how to use a multi meter and noid lights and diagnose the injector circuit error code on my Jeep Wangler TJ 4.0L and learn that my injector is good and PCM was good and that the issue was in the harness! So cool! I’m a digital marketer and a marketing director is my day job. So fun working on the Jeep! Thanks doe the video!
Great explanation! I have a buzzer that I hook up at the PCM in this situation, often allowing a quick wiggle test to pinpoint the open in the harness in case it's somewhere I can't see the scope/meter. Great work!
If the plastic of the wires going to the injector plug is cracked open but not touching each other or the ground(Body of engine) could this still cause a small misfire during a cold idle? When I say small misfire I mean a misfire that does not register on the ECU of vehicle just like a slight stumble as if an injector gave too much or too little fuel.
It is! Are you struggling to follow it? May I suggest you sit through my page for page teachings of it on my premium channel? I promise you it is DIY friendly and I can fill in the blanks for you. 36 cents per day, you can't beat what I'm offering. Hope to see you there www.scannerdanner.com/join-scannerdanner-premium.html
Thanks Steve. I'll show you were the open in I'm my part 5 video on my other channel. It's pretty cool. I guess I should have put that part in here. I just didn't think it was very important in this context.
I have a 350z...has P0304 misfire code. I switched the coils, plugs, injectors around. No change in misfire code. When I tore the engine down I found the factory fuel injection harness had butt connections instead of an actual factory plug. I'm guessing it's the wire harness. The VQ35de engine has the injectors hidden under the plenum. So it's gonna be difficult to run this test. I'm just gonna throw a $185 wiring harness on it and hope for the best. Thanks for this video. It made me confident this is the problem I'm having
Great video. I have a misfire on my 2013 x5 n55 engine and I just verified that injector 5 was bad by testing each connector, and I got the same .485 volts across each plug with key in on position. I'm going to run the same test on plug 5 with engine on this time and verify against cylinder 1 if the same voltage is coming through. Thank you.
Warm greetings from Poland. I am watching Your Videos and still learning to fix my 88 pontiac Firebird no injector pulse problem. 12 on power side and 8v on signal side with key on. Thx for very goood videos.
That's not right. With key on only, you should see 12 and 12, not 12 and 8 You're firebird is a group fired injection system and one shorted injector can cause all of them to not fire. I have some videos on these, let me find them...
Good Afternoon Paul Danner and happy blessed Friday 🙏. I have a (2003 Dodge Caravan SE V6 3.3) and its throwing 2 codes (P1684-Battery Was Disconnected) & (P0201-Injector #1 Control Circuit). I have the 2003 powertrain diagnostic procedures book for the code (P0201-Injector #1 Control Circuit) and I have the 2003 Transmission Diagnostic Procedures book for code (P1684-Battery Was Disconnected.) I have taken action and followed instructions from the book that gives procedures for code (P0201) and i applied Test#1 & Test #2. Im on Test #3 now and these are the instructions..... Turn the ignition off. Disconnect the Fuel Injector harness connector. Remove the ASD Relay from the IPM. Turn the ignition on. Jumper the Fused B+ circuit and the ASD Relay Output circuit in the IPM. Using a 12-volt test light connected to ground, probe the (K342) ASD Relay Output circuit. Does the test light illuminate brightly? Yes➡️➡️➡️ Go To 4 No ➡️➡️➡️ Repair the open in the (K342) ASD Relay Output circuit. Perform POWERTRAIN VERIFICATION TEST VER-5. Im not grasping and understanding these instructions as to where i can apply it and take action doing test steps from the book. Are you able to help me grasp and understand this procedure of Test #3? Test #2 procedure from the book for code (P0201) i applied the procedure and i filmed myself applying it. ua-cam.com/video/r7xmOt0ueGk/v-deo.html
Nice one! Don't forget to also check the noid light before using (or at least on a couple of cylinders like you did) ... almost got burnt one time thinking that I had a control problem, when in fact the light was bad.
***** another thing to keep in mind is that the computer will not control the injector with a misfire or fault. Obviously not the case here as there should be 12v to the PCM. Me personally have spent good money on diagnostic equipment. Granted in this circumstance you don't need fancy tools. To do diagnostics and not have advanced tooling doesn't make any sense. You can't make "100% calls".
Im having trouble exact same problem #4 injector has no blinking , and also some fuses in my fuse box dont light up when putting the test light what could cause that? i checked the fuses and switched them to ones that are working and no fix .
Shalom brother. Is it possible for a PCM to cause an intermittent bad injector driver problem? Or it could be more likely to be intermittent wiring problem?
Thank you, you may have just saved me a lot of money. 2010 mercury Milan intermittent misfire. I may have a bad PCU since it seems to work when it's cold and misfire after it warms up. But at least now I know how to check and verify.
Great video thanks . I have a car that the #8 injector has no pulse . I was told the computer was bad . I took apart the engine compartment to fix other issues and there are several areas of exposed wires . I don't visually see any breaks. My question is my ecu has hundreds of pins ( connectors ) in the plug . Do one of those pins go to that injector ? I'm gonna start tracing tommorow. Can I test the circuit by conning one of the pins to the connecter ? This would help me before I spend 1500 on new ECU and flashing . Mike
I've been having problems w/ my 2004 BMW M3, where for some reason cylinder 6 is flooding like the injector is stuck open or something, I had the injectors worked on and they are back to brand new status and it was still doing it. I am guessing that there's a short on the harness or somewhere that is keeping the injector on open position or something. But the thing is it jumped from cylinder 6, then cylinder 5 was doing it for a bit then went back to cylinder 6 now. not sure what is going on. Compression test (the best I could is do a cold compression test) came out pretty good considering its cold engine and it was almost at the minimum compression values already (at 150psi. recommended is between 160-172) which I can see it reaching recommended compression when its warmed up. How do I test the wiring if they are just on all the time?
Hey ScannerDanner! I’m trying to diagnose my own vehicle and would love some insight Cyl 4 misfire, ignition is good but it looks like no fuel is getting to that cylinder, swapped out injectors and moved them around and still at cylinder 4. The spark plugs were replaced and you can tell that the 4th cyl plug looks brand new still. So, this leads me to think there is an open circuit somewhere between the ecm and the fuel harness, what would you do in my position?
Hey Scanner Danner correct me if im wrong ok if i did not have a noid light could i just have the koeo and backprobe both wires unplug and the one that reads 0 could i take a test light to b+ on that 0 volt wire an see a pulse cause i have a similar problem on a car im working on
To find an open or a short in a wire, Power Probe's circuit tracer works well. It is unique in that it switches from tracing E field (voltage, open wire) or H field (current, loaded or shorted wire) as needed and LED even indicate direction of current flow. No, I don't work for PP, I'm just a satisfied customer.
I have a 93 ford f150 5.0 When I turn the key to allow fuel pump to energize; it stays hot. With the key turned my IAC , fuel injectors are hot on the control and feed wires. I disconnected the PCM and probed the control wires, still 12v. Fuses and relays good. Any suggestions? I can hold a rag drenched in gas at the breather and it will crank right up. Could the ignition switch be grounding out causing power to fuel pump and injectors to be 12v constant When the key is turned?
great video help me find my shorted out injector harness but I still have a po205 injector controller issue i even replaced the injector but i still have the problem can i use a volt meter to test and see if the pcm driver is working properly
Thank you am a old Radio tec years ago You give me and others A refresh a cost on trouble shooting you Helped me with my 90 Fox body neg trigger ing on the injections Now I have to use led s No load test lights Fiber ocs thanks PA Guy kev in ny
Thanks for this. Currently trying to resolve a misfire issue where spark is present and the fuel injector seems to be firing when listening to it through a hose.
Very informative, just one point, it took me a couple of times watching your test at the engine computer to understand what you were doing. Sometimes us DIY’rs who are still learning need the information fully explained to us , step by step. I finally figured out the test results at the computer, when I broke it down to a simple electrical circuit. Just my 2 cents. Excellent video none the less. You are a great human being, helping the average person to diagnose and fix their own car. God bless.
There is no excuse however if the employe of the shop doesn't pushes tech to be professionals and if he grooms them to just be Parts changers then this is what happens a real mechanic knows exactly how things work and knows exactly how to troubleshoot there's a big difference from people who just throw Parts at something and people who actually know what's going on this is one of the reasons why I got out of the trade when I was in the trade there was no respect for people who knew what they were doing it there was a lot of respect for people who change Parts because people will change Parts make the shop money there's a fine line there and business owners need to learn how to walk that line good job with this video I appreciate you showing how some simple steps when troubleshooting can resolve head-scratching problems I repaired a similar problem last night on a friend's car it's been 17 years since I put my hands under a hood yet I knew exactly where to look because I have the same attitude as you you don't always need to have all these fancy tools you just need to have some common sense and some troubleshooting skills
I have a 1998 buick with two of the injectors not pulsing. I did already replace all 6 injectors myself. Cheap and easy, and took under an hour. It appears that I need to start digging in the harness for an open connection. . . Electrical problems.can be such a time such. . . Grrrrr!!! ;-)
Great video! I have a question, I have a 98 Ford ranger 3.0 I have to take the plenum off to check the number 5 injector and wiring. I will not be able to run the truck how would I do this testing? Will it work with the key in the on position?
I have around 400 videos on this channel and another 340 on ScannerDanner Premium. I am certain you will find exactly what you are looking for if you continue to follow me. Thank you!
Hey I’m having an issue, I get dead injectors (ground disappears) when the car goes past 45mph or if the car idles and I unplug the injector for more than 10 seconds, I took the pcm out to inspect for signs of damage but I don’t see anything wrong, I tested the pin (injector1) and it lights up with ground but same (ground disappears) when I disconnect the harness from the injector, I’m trying to figure out why ground disappears at idle if I disconnect the harness from the fuel injector
If I drive under 30mph the car runs fine, if it just idles it idles fine , but when I go over 45 or I disconnect the fuel injector for 10-15 seconds I lose the pulsing ground straight from the pcm
Scanner Danner, could we have back-probed the control side wire of the injector plug (or front-probed it with the injector unplugged) and used a test light connected to battery positive and watched to see if it lit up when the vehicle was running in order to verify that there was no signal reaching it (i.e., it being intermittently grounded out by the PCM signal/pulse. Is this the other procedure you were referring to in the writing on the bottom of the screen in the video without using a noid light, but just didn't show us)? Also, are there any other tests that we could use to verify that there is an open in the control wire, without back-tracing the wire to the PCM/firewall? (I'm assuming that if we didn't have ready access to the wiring diagram, that the wire you're checking coming from the PCM would be the same color of wire that's coming from the control side of the injector connector?) Thanks!
at 1:37 theres a note 4 using a test light instead of the noid. do I connect the two sides of the test light to the connector? basically jumping the connector using the test light?
superb video dan, i just want to ask a question. suppose that there is not pulse in first cylinder injector, then is that possible that there will be not current in ignition coil of 1st cylinder?
My name is Paul Danner 😉 Symptoms dictate the answer! Is your question about a single cylinder misfire, or a complete no start? You can have spark and no injector pulse, you can have injector pulse with no spark, you can have no spark and no injector pulse! All dictated by design differences and what the fault is, from car to car.
I really dig your viseos they're very informative and ive learned a couple things watching them, but how do i go about testing the injectors when they are sandwiched between the lower plenum and the intake manifold? I have a 01 Nissan Pathfinder 3.5 4x4. If you can give me a couple of pointers or a direction that i need to go in to accomplish this task. Thanks in advance.
Hi SD, I mistakenly grounded my test light and started the car, the test flashed 3 times and stopped, now after watching your video, I Realise that I should have used battery positive, now there is no longer any signal when I start the car. My question is, is my ECM destroyed?
will a bad injector or injector feed wire end cause the engine to throw a p300 code and run super rough? my car starts but runs like its on 3 out of 4 cylinders barly drivable it stalls and bucks.. any info would be helpful guys! thanks
+Harlee Bro yes, an injector that is not firing will cause a misfire and misfire codes. I've seen many times a random misfire (P0300) caused by a single cylinder misfire. Also you need to check compression, low compression will cause a misfire too. If you can, perform a cylinder drop test first and figure out what cylinder is causing your issue. Then once you've identified that, check for spark, fuel and compression. Here is a few videos showing the cylinder drop test ua-cam.com/video/5ewJIBS9L98/v-deo.html ua-cam.com/video/OH_U3D4S5Q4/v-deo.html ua-cam.com/video/m2fubKkvZVI/v-deo.html
Is it likely that a control module would be intermittent? I have a negative pulse sometimes but mostly no pulse. The car is in a parking lot and i didn't have a diagram to find the pin on the ECM. Trying to decide weather to tow to my house or a shop that can program the ECM 2011 Corolla. I am guessing that the ECM would be permanently bad if it was the problem.
This video was taken from a 5 part training series I did for my students on various ways to identify a misfire and restricted exhaust testing. You can find this 5 part series here
www.scannerdanner.com/scannerdanner-premium-chapters/misfire-case-studies.html
Thanks for the great info! I have a injector wiring issue on my 2007 jeep wrangler. I have a cylinder #4 misfire. Its reading 14.0 -14.1 only on #4 cylinder. 1,2 3,5 and 6 injectors read 13.6 -13.8 and never reach 14.0. Where could my problem be?
Do you know of a great mechanic in the 92336 zip code area. I am in Southern California. I have a 2000 Ford mustang v6 with a crank no start, no spark. I have checked about everything, I think, and I am thinking it probably something simple that I am missing. Any help appreciated ¹
@@victorrodriguez2158 I have a few shops using my training in southern California. Check out our shop directory www.scannerdanner.com/find-sd-shops.html
Thanks I just found out what the problem was thanks to your video on crankshaft sensor. I was getting no spark on ignition coil pack but did have voltage on the connector. So checked voltage on the fuel injector with a light probe. The control side was no lighting the probe when I cranked the engine. So I checked the crankshaft sensor by the harmonic balancer. As I was checking the connection, I noticed the teeth weren't underneath the crankshaft sensor and the belt seemed off. After further inspecting the harmonic balancer I notice it was coming out which got the teeth to not be underneath the crankshaft sensor. The bolt holding the harmonic balancer had broken off and balancer was coming off.
Thanks again
I have been a mechanic for over 13 years now. I just want to say thank you because your videos have taught me a lot more than what I thought I know. You are a beast and probably one the best diagnostics people out here I would consider. Keep up the good work and we appreciate the videos.
MikesWorld211 thanks man!
I 2nd that ✊🏽
extremally informative... Thank you!!!
ScannerDanner you are the man! Super appreciate your tutorials for the common dude to use basic tools. I was able to use my multi-meter and trouble light to trace a bad #7 open, just by watching your video. Saved myself a boatload!!!! Thank you so much.
Great video on a simple open. This is the kind of stuff that takes maintenance skills to the next level separating the real wrenches from the parts changers. If you want to be a great mechanic who has families sending everyone they know to you and their kids and so on....Be like Paul Danner. He fixed this cat's ride for a fraction of the cost of the computer swap the guy before him did. This customer will be back again for honest service. Paul, keep up the great work, you are setting the example and helping make a good name for the trade.
Thanks man!
Awesome instructional video, thank you for making it and sharing it. I had just completed the dreaded plenum plate and gasket repair on a Dodge 5.2, along with numerous other repairs and replacements while in there. I had one cracked fuel injector, so I bought a new one to replace it. It was a BWD (Borg Warner). Got everything put back together, and it was running like complete shit, bad idle, wanting do die, missing, etc. The computer finally kicked a code, P0208, which was the same cylinder that had the brand new injector. Found this video doing research, planning for the worst, even a possible broken valve spring. Well I checked the resistance on that injector, and there was none. Brand new, non working injector. Just replaced it and my truck is running the best it has since I've owned it! Lesson to be learned, don't ever count on brand new parts to be in working condition! Anyways, thanks again for the video!
Thank you for doing this kinda stuff with the basic tools. I'm still building my Diagnostic Arsenal and watching your videos really showed me how valuable having a Scope and more importantly having the knowledge on how to use it properly can help diagnose problems correctly. But Until I get the ability to buy one. Seeing that there are a lot of good things that can be done with just a plan ole multi meter and Test light is SUPER helpful.
Great video Paul as always. Not being a professional it is really helpful to see these basic tests performed. Thank you for sharing your vast experience and knowledge on this and your premium channel which I have to say offers unbeatable value for money having watched the contents. I never stop learning something new.
Paul, thanks for showing that, it is good info. Perhaps you should have explained how the injector circuits work, as i think that not many do understand. I'm a Chrysler dealer tech, and the way Chrysler designed their systems, the injectors get 12v all the time, the pcm turns the ground on/off to turn the injectors on/off. I don't know atm how all the other manufacturers design their injector circuits, but wanted to point that out in the event that there are different designs.
Wanted to thank you for your fathers service in Vietnam. Read in the comments . I am very proud of him and the amazing son he raised . God bless you brother
Thanks so much brother
I continue to say it..you rock.. love the way you analyze things.. and at that with simple tools ..thank you for always throwing little freebies every now and then our way ..
To the guys that are busting my man about his 454 small block, where is your videos on youtube??? G M made a 265, 283, 327, 305, 350, 302, and a 400 small block. But that was before your time. This young man took his time to make a very informative video and you know-it-alls kick him just for your own lack of self respect. Bless your hearts.
I'm sorry, what video are we talking about? This one?
I'd use the term 'technician' lightly to describe the other guy. Why is it that customers need to constantly pay for incompetencies and skill inadequacies of service people ?
Patient is describing a heartburn sensation? ; lets put him on the heart transplant recipient list. crazy
dude, you're a breath of fresh air to the world of automotive diagnostics. Keep it up.
Great video another thing I can add to my arsenal. I thank you I learn something new every time I watch one of your videos.
Best video explaining and true oldschool skills - Respect !
Thanks. I learned something today and I hope to implement it in fixing a project car I purchased.
You make it look so easy Paul 👍, excellent tuition
THE POST IS PRETTY OLD, BUT I REALLY THANKFUL FOR YOUR DEDICATION SPENDING YOUR TIME AND KNOWLEDGE TO HELP OTHERS. I LEARNED TO DO SOME WORK ON MY CARS BECAUSE OF SOME PEOPLE TO RIP OTHERS
Thanks danner for your support and tell James we miss him and his famous test light.
Thank you very much for presenting an evidenced based solution in an affordable, fundamental manner.
Thank you. I’m not a mechanic or tech not even close. I used your video to learn how to use a multi meter and noid lights and diagnose the injector circuit error code on my Jeep Wangler TJ 4.0L and learn that my injector is good and PCM was good and that the issue was in the harness! So cool! I’m a digital marketer and a marketing director is my day job. So fun working on the Jeep! Thanks doe the video!
How awesome is that! Thanks for sharing and nice job
As usual, fantastic.
I like the idea of troubleshooting using common tools. This is nothing but awsome.
Thank you.
Definitely! I don't have one of those expensive scopes, just a multimeter, and a test light. Not planning on buying a scope, not in the budget,
Thanks for this video, Im going to check my truck like this. Appreciate It!!!
Thanks Scanner. Simple and to the point.
Great explanation! I have a buzzer that I hook up at the PCM in this situation, often allowing a quick wiggle test to pinpoint the open in the harness in case it's somewhere I can't see the scope/meter. Great work!
If the plastic of the wires going to the injector plug is cracked open but not touching each other or the ground(Body of engine) could this still cause a small misfire during a cold idle? When I say small misfire I mean a misfire that does not register on the ECU of vehicle just like a slight stumble as if an injector gave too much or too little fuel.
I have this same Problem. Thanks for the help Paul
thanks for your expert teaching...
Cool informative and humbling 👍
Basic tools that helps alot of home mechanics . Wish your book was more flexible and home mechanic friendly. Thanks a million for posting these.
It is! Are you struggling to follow it? May I suggest you sit through my page for page teachings of it on my premium channel? I promise you it is DIY friendly and I can fill in the blanks for you. 36 cents per day, you can't beat what I'm offering. Hope to see you there www.scannerdanner.com/join-scannerdanner-premium.html
Real nice, just a test light and six minutes. Now that was way cool 👍
Thanks Steve. I'll show you were the open in I'm my part 5 video on my other channel. It's pretty cool. I guess I should have put that part in here. I just didn't think it was very important in this context.
I bought your book. Thank you for publishing it.
Love the Chief's anchor in the background! Go Navy!
Thanks man. A friend of mine gave it to me. My dad served in the Navy during the Vietnam war.
ScannerDanner Premium Thank your dad for his service for me.
Car fundamentals troubleshooting techniques
Very helpful and we all
Appreciate your tutorial.
Great video. Thank you!
thanks paul every little bit helps
Quick and easy, thanks for the video Paul
Thanks brother
@@ScannerDanner ????????
I have a 350z...has P0304 misfire code. I switched the coils, plugs, injectors around. No change in misfire code. When I tore the engine down I found the factory fuel injection harness had butt connections instead of an actual factory plug. I'm guessing it's the wire harness. The VQ35de engine has the injectors hidden under the plenum. So it's gonna be difficult to run this test. I'm just gonna throw a $185 wiring harness on it and hope for the best. Thanks for this video. It made me confident this is the problem I'm having
Hey Paul. Nice refresher. Keep up the the good work. I'm gonna subscribe again.
Thanks Richard!
Great video. I have a misfire on my 2013 x5 n55 engine and I just verified that injector 5 was bad by testing each connector, and I got the same .485 volts across each plug with key in on position. I'm going to run the same test on plug 5 with engine on this time and verify against cylinder 1 if the same voltage is coming through. Thank you.
nice find and big help for me has my bmw same on 8 cylinder not firing thx for showing this
Thank you sir for all that you do for us 🙏
Ill be praying for u and your family
Warm greetings from Poland. I am watching Your Videos and still learning to fix my 88 pontiac Firebird no injector pulse problem. 12 on power side and 8v on signal side with key on. Thx for very goood videos.
That's not right. With key on only, you should see 12 and 12, not 12 and 8
You're firebird is a group fired injection system and one shorted injector can cause all of them to not fire. I have some videos on these, let me find them...
I have been watching you first a number of years. Congratulations on the channl. From a guy with a Oscilloscope.
Nice. Then we speak the same language :)
Thank you, really good tip with hooking up a light to see that there is a signal to the injector!
Absolutely superb sir,
Thanku.very helpfull indeed.
Good Afternoon Paul Danner and happy blessed Friday 🙏.
I have a (2003 Dodge Caravan SE V6 3.3) and its throwing 2 codes (P1684-Battery Was Disconnected) & (P0201-Injector #1 Control Circuit).
I have the 2003 powertrain diagnostic procedures book for the code (P0201-Injector #1 Control Circuit) and I have the 2003 Transmission Diagnostic Procedures book for code (P1684-Battery Was Disconnected.)
I have taken action and followed instructions from the book that gives procedures for code (P0201) and i applied Test#1 & Test #2.
Im on Test #3 now and these are the instructions.....
Turn the ignition off.
Disconnect the Fuel Injector harness connector.
Remove the ASD Relay from the IPM.
Turn the ignition on.
Jumper the Fused B+ circuit and the ASD Relay Output circuit in the IPM.
Using a 12-volt test light connected to ground, probe the (K342) ASD Relay Output circuit.
Does the test light illuminate brightly?
Yes➡️➡️➡️ Go To 4
No ➡️➡️➡️ Repair the open in the (K342) ASD Relay Output circuit.
Perform POWERTRAIN VERIFICATION TEST VER-5.
Im not grasping and understanding these instructions as to where i can apply it and take action doing test steps from the book.
Are you able to help me grasp and understand this procedure of Test #3?
Test #2 procedure from the book for code (P0201) i applied the procedure and i filmed myself applying it.
ua-cam.com/video/r7xmOt0ueGk/v-deo.html
Nice one! Don't forget to also check the noid light before using (or at least on a couple of cylinders like you did) ... almost got burnt one time thinking that I had a control problem, when in fact the light was bad.
Good point brother thanks!
***** another thing to keep in mind is that the computer will not control the injector with a misfire or fault. Obviously not the case here as there should be 12v to the PCM.
Me personally have spent good money on diagnostic equipment. Granted in this circumstance you don't need fancy tools. To do diagnostics and not have advanced tooling doesn't make any sense. You can't make "100% calls".
Turbotomass Good point... on older systems it'll still fire the injectors. A glowing cat will verify that! LOL
***** Too right: THE fundamental of using any test tool is to first ensure that it works!
excellent video! I just found the solution of my problem!
Great video for the DIY'er. Score!
Thanks!
Im having trouble exact same problem #4 injector has no blinking , and also some fuses in my fuse box dont light up when putting the test light what could cause that? i checked the fuses and switched them to ones that are working and no fix .
Thank you scanner danner good video, for us that don't have a scoop👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍
quick question re test light - do they have to be computer safe? Will a 6-12V tester be any good for testing the 5V side of sensors?
That was pretty damn good, thanks.
Shalom brother. Is it possible for a PCM to cause an intermittent bad injector driver problem? Or it could be more likely to be intermittent wiring problem?
Did you see my latest upload to ScannerDanner Premium?
ua-cam.com/video/wQTPToX6P9U/v-deo.html
Great show brother
Thank you, you may have just saved me a lot of money. 2010 mercury Milan intermittent misfire. I may have a bad PCU since it seems to work when it's cold and misfire after it warms up. But at least now I know how to check and verify.
Intermittent misfiring is typically ignition related
Great video thanks . I have a car that the #8 injector has no pulse . I was told the computer was bad . I took apart the engine compartment to fix other issues and there are several areas of exposed wires . I don't visually see any breaks. My question is my ecu has hundreds of pins ( connectors ) in the plug . Do one of those pins go to that injector ? I'm gonna start tracing tommorow. Can I test the circuit by conning one of the pins to the connecter ? This would help me before I spend 1500 on new ECU and flashing . Mike
I've been having problems w/ my 2004 BMW M3, where for some reason cylinder 6 is flooding like the injector is stuck open or something, I had the injectors worked on and they are back to brand new status and it was still doing it. I am guessing that there's a short on the harness or somewhere that is keeping the injector on open position or something.
But the thing is it jumped from cylinder 6, then cylinder 5 was doing it for a bit then went back to cylinder 6 now. not sure what is going on. Compression test (the best I could is do a cold compression test) came out pretty good considering its cold engine and it was almost at the minimum compression values already (at 150psi. recommended is between 160-172) which I can see it reaching recommended compression when its warmed up.
How do I test the wiring if they are just on all the time?
Hey ScannerDanner!
I’m trying to diagnose my own vehicle and would love some insight
Cyl 4 misfire, ignition is good but it looks like no fuel is getting to that cylinder, swapped out injectors and moved them around and still at cylinder 4. The spark plugs were replaced and you can tell that the 4th cyl plug looks brand new still. So, this leads me to think there is an open circuit somewhere between the ecm and the fuel harness, what would you do in my position?
Wow . you realy are scanner Danner, and that was the best dam scannen to make some good planen ive ever seen
Props man, where are your classes located? I would really like attend your classes. Great teaching skills. Well spoken.
Abdolutely superb sir.thankyou steve from the uk.
so if you check power at the injector and have 12 volts on both wires it is a ground side switched circuit which is also pull down design right?
Hey Scanner Danner correct me if im wrong ok if i did not have a noid light could i just have the koeo and backprobe both wires unplug and the one that reads 0 could i take a test light to b+ on that 0 volt wire an see a pulse cause i have a similar problem on a car im working on
I have a 2004 Silverado and its throwing a P0200 code and I was told that I have to replace my fuse box and harness I'm trying to get a second opinion
To find an open or a short in a wire, Power Probe's circuit tracer works well. It is unique in that it switches from tracing E field (voltage, open wire) or H field (current, loaded or shorted wire) as needed and LED even indicate direction of current flow. No, I don't work for PP, I'm just a satisfied customer.
I have a 93 ford f150 5.0
When I turn the key to allow fuel pump to energize; it stays hot. With the key turned my IAC , fuel injectors are hot on the control and feed wires. I disconnected the PCM and probed the control wires, still 12v. Fuses and relays good. Any suggestions? I can hold a rag drenched in gas at the breather and it will crank right up. Could the ignition switch be grounding out causing power to fuel pump and injectors to be 12v constant When the key is turned?
Nice video!
great video help me find my shorted out injector harness but I still have a po205 injector controller issue i even replaced the injector but i still have the problem can
i use a volt meter to test and see if the pcm driver is working properly
The voltmeter won't be the best tool for testing the computer driver. Use a test light
Thank you am a old
Radio tec years ago
You give me and others
A refresh a cost on trouble shooting you
Helped me with my 90
Fox body neg trigger ing on the injections
Now I have to use led s
No load test lights
Fiber ocs thanks PA
Guy kev in ny
which engine is better efi or mpi for better fuel economy ?
NICE TIP PAUL
I have a 01 Mercury Grand Marquis I changed my gear selector and they ran before that but now I'm not getting power to the injectors so they can start
Awesome video
Good job
If you tested 12 v on both wires to injector would that indicate a faulty wire in the harness?
Another Wonderful Troubleshooting skills and experience
Thanks for this. Currently trying to resolve a misfire issue where spark is present and the fuel injector seems to be firing when listening to it through a hose.
Check compression too
Thanks this really helps
Very informative, just one point, it took me a couple of times watching your test at the engine computer to understand what you were doing. Sometimes us DIY’rs who are still learning need the information fully explained to us , step by step. I finally figured out the test results at the computer, when I broke it down to a simple electrical circuit. Just my 2 cents. Excellent video none the less. You are a great human being, helping the average person to diagnose and fix their own car. God bless.
There is no excuse however if the employe of the shop doesn't pushes tech to be professionals and if he grooms them to just be Parts changers then this is what happens a real mechanic knows exactly how things work and knows exactly how to troubleshoot there's a big difference from people who just throw Parts at something and people who actually know what's going on this is one of the reasons why I got out of the trade when I was in the trade there was no respect for people who knew what they were doing it there was a lot of respect for people who change Parts because people will change Parts make the shop money there's a fine line there and business owners need to learn how to walk that line good job with this video I appreciate you showing how some simple steps when troubleshooting can resolve head-scratching problems I repaired a similar problem last night on a friend's car it's been 17 years since I put my hands under a hood yet I knew exactly where to look because I have the same attitude as you you don't always need to have all these fancy tools you just need to have some common sense and some troubleshooting skills
I have a 1998 buick with two of the injectors not pulsing. I did already replace all 6 injectors myself. Cheap and easy, and took under an hour.
It appears that I need to start digging in the harness for an open connection. . . Electrical problems.can be such a time such. . . Grrrrr!!!
;-)
Great video! I have a question, I have a 98 Ford ranger 3.0 I have to take the plenum off to check the number 5 injector and wiring. I will not be able to run the truck how would I do this testing? Will it work with the key in the on position?
I don't know what you are working on but this video should help you
ua-cam.com/video/wQTPToX6P9U/v-deo.html
Proper test procedures save time and money .
Can you trace the wire back to the computer by color-code?
I got p0305 compression is good spark plug is not firing that can be from an open circuit in the harness? Or pcm?
Possibly a bad coil pack? Try swapping with another coil pack and see if you get a p0303 or whichever one you swapped it with.
How to check disel car injector grip have a Current or Pulse.i don't know.please tell me sir with simple explanation.
Helo Danner, I like to know this method of diagnostic more, so if there are more videos like this to show. . . I appreciated, thanks. . .
I have around 400 videos on this channel and another 340 on ScannerDanner Premium. I am certain you will find exactly what you are looking for if you continue to follow me. Thank you!
Hey I’m having an issue, I get dead injectors (ground disappears) when the car goes past 45mph or if the car idles and I unplug the injector for more than 10 seconds, I took the pcm out to inspect for signs of damage but I don’t see anything wrong, I tested the pin (injector1) and it lights up with ground but same (ground disappears) when I disconnect the harness from the injector, I’m trying to figure out why ground disappears at idle if I disconnect the harness from the fuel injector
If I drive under 30mph the car runs fine, if it just idles it idles fine , but when I go over 45 or I disconnect the fuel injector for 10-15 seconds I lose the pulsing ground straight from the pcm
Scanner Danner, could we have back-probed the control side wire of the injector plug (or front-probed it with the injector unplugged) and used a test light connected to battery positive and watched to see if it lit up when the vehicle was running in order to verify that there was no signal reaching it (i.e., it being intermittently grounded out by the PCM signal/pulse. Is this the other procedure you were referring to in the writing on the bottom of the screen in the video without using a noid light, but just didn't show us)? Also, are there any other tests that we could use to verify that there is an open in the control wire, without back-tracing the wire to the PCM/firewall? (I'm assuming that if we didn't have ready access to the wiring diagram, that the wire you're checking coming from the PCM would be the same color of wire that's coming from the control side of the injector connector?) Thanks!
at 1:37 theres a note 4 using a test light instead of the noid. do I connect the two sides of the test light to the connector? basically jumping the connector using the test light?
superb video dan, i just want to ask a question. suppose that there is not pulse in first cylinder injector, then is that possible that there will be not current in ignition coil of 1st cylinder?
My name is Paul Danner 😉
Symptoms dictate the answer! Is your question about a single cylinder misfire, or a complete no start?
You can have spark and no injector pulse, you can have injector pulse with no spark, you can have no spark and no injector pulse! All dictated by design differences and what the fault is, from car to car.
what is the name of your book, were can i purchase it.
I really dig your viseos they're very informative and ive learned a couple things watching them, but how do i go about testing the injectors when they are sandwiched between the lower plenum and the intake manifold? I have a 01 Nissan Pathfinder 3.5 4x4. If you can give me a couple of pointers or a direction that i need to go in to accomplish this task. Thanks in advance.
info was helpful
pls I need 2013 escape 1.6 injector circuit diagram ,
very good video
Hi SD, I mistakenly grounded my test light and started the car, the test flashed 3 times and stopped, now after watching your video, I Realise that I should have used battery positive, now there is no longer any signal when I start the car. My question is, is my ECM destroyed?
will a bad injector or injector feed wire end cause the engine to throw a p300 code and run super rough? my car starts but runs like its on 3 out of 4 cylinders barly drivable it stalls and bucks.. any info would be helpful guys! thanks
+Harlee Bro yes, an injector that is not firing will cause a misfire and misfire codes. I've seen many times a random misfire (P0300) caused by a single cylinder misfire.
Also you need to check compression, low compression will cause a misfire too.
If you can, perform a cylinder drop test first and figure out what cylinder is causing your issue. Then once you've identified that, check for spark, fuel and compression.
Here is a few videos showing the cylinder drop test
ua-cam.com/video/5ewJIBS9L98/v-deo.html
ua-cam.com/video/OH_U3D4S5Q4/v-deo.html
ua-cam.com/video/m2fubKkvZVI/v-deo.html
l have these problem in my jeep please tell me how to end it
I do, in the video. I have other injector problem videos here if you need more help
ua-cam.com/play/PLAFYVCyenqcoYm94zK0-EP0ICsGWj_ICs.html
Is it likely that a control module would be intermittent? I have a negative pulse sometimes but mostly no pulse. The car is in a parking lot and i didn't have a diagram to find the pin on the ECM. Trying to decide weather to tow to my house or a shop that can program the ECM 2011 Corolla. I am guessing that the ECM would be permanently bad if it was the problem.
thank you