Thank you. Helped my friend out. He had a few failed sensors. All start related. After a while it had trouble starting. Once it started we let it run for a little while then turned it off to pickup and put some tools away. After a while the car wouldn’t start. Found this video and purged some fuel. It started right away. He’s going to buy a fancy screwdriver to put on his keychain. 2008 Jeep Commander
Thank you very much for the information just finished work jumped in my vehicle could not get it started was thinking it was fluid pump gas filter so I left my vehicle on my job thank you so much for that information
Yeah I had same problem on 2010 jeep liberty 3.7 liter engine. Spent $5400 at the dealer for new PCM, new left block with cracked head gasket. 1 month later back to the same problem. Thanks you 🙏 for the answer. I’ve done so much electrical troubleshooting and came back to ASD relay and that’s why the PCM was replaced
Thank you. great video!!!! I had this problem on my for the past 3 years 2008 jeep with 350,000 miles, I think the main issues is the that engine is running to hot, keep your temp gage under 1/2 after running, I had this happen when my thermostat was faulty, the second time was when antifreeze was low. every time the temp gage went over 1/2 I had this problems
Good morning My son has the same issue on his 08 jeep Grand Cherokee 3.7 As A Mechanic for over 47 yrs. i had these issues back in the Day... so i tryed so old school troubleshooting, i ran an aux fan to a switch & relay to this fan and let it run as car is running , i also hooked up a pressure tester with gauge & release button, and finally i installed a cold air intake to get rid of that hot closing filter cover. My son is driving her and we will be testing this out for one week.. will get you info. thanks for your video..
Glad I came to this video, I have resolved this issue a few years ago, by just adding non ethanol fuel to the tank; those new gasoline mixes contains crazy amounts of ethanol (I live in Florida and gets pretty hot) while resting in the hot rails ethanol will boil at a lower point than just regular pure gasoline and therefore create vapor lock. Of course non ethanol fuel is extremely expensive especially right now, I simply add a can or two of seafoam to neutralize the ethanol and avoid vapor lock. Hope my 2 cents help! 😁
G B, I agree non-ethanol fuel helps. I run it in all of my small engine equipment and our 1930 Model A. It works great. Unfortunately it would be crazy expensive to constantly put in a daily driver. I did try it, but the fuel cost was astronomical.
My mom has a jeep grand cherokee 08 and air just checked it out today to find it has what I believe to be the same problem. I'll will definitely give this little trick a try. Thank you sir.
2008 Jeep Grand Cherokee Laredo with failed start on first go but always starts on the second with no signs of working overtime for the second crank. It almost sounds as if the engine didn’t turn over fully but cranks and turns over just fine any other time when starting from cold. Only happens when the truck is up to running temp.
I have had this problem for years with my wifes 2007 Jeep Grand Cherokee. It would be intermittent and yesterday I think I found the cause. The producer of this video of this correct it is indeed vapor lock, but check your coolant level! I had a leaking water pump- and this caused my Jeep to began doing this no start but crank condition. While replacing this water pump, I also decided to flush my coolant system. After installing the new pump I began to refill the system with coolant. I took the car for a ride, and noticed it was getting hotter than normal due to a air pocket in the coolant system. This really aggravated the no start symptom (vapor lock).- worse than ever before! Once I completely filled the coolant the car was fine the rest of the day. Having low coolant would effect the temperature of the intake manifold and the fuel rails are right there. So in short- YES this is vapor lock, but check your coolant system for the proper coolant level- this will allow the temp to stay low. This is why these cars did not due this when new. Once leaks develop, or fluid levels are not correct, the temp will rise and cause the vapor lock. In fact this is the 3rd water pump I have installed, and all my crank but no starts started happening when these pumps began leaking.
I have a 2007 jeep commander with this same issue & it looks like we have same motor so I bet I'm in the same boat with you & thank you for this temp fix
Same, mine has the 3.7 and I just bought mine 2 days ago, was gonna take it back to the dealer tomorrow but now that I’ve seen this I don’t know what to do
thank you it was driving me up a wall, now i just let the pressure out and bam starts right up. I thought i knew a lot put engines in put the valve body in to fix the going into limp mode. so, thanks again.
I got foam pipe insulation and wrapped the fuel rail including any fuel lines under the hood ..it helps lots . Living in Florida .. got the tip from a old timer... Jeep mechanic
@@CCWP0251 Thank you for this vid. The frustration of this happening is overwhelming especially at a time like this. Sometimes ill disconnect battery thinking itll work but nope. It randomly starts whenever it wants even after replacing battery ,starter , & alternator.
My sisters 07 Jeep Cherokee showed same signs of vapor lock and doing this allowed her to get it started. However she has also had issues with the theft deterrent system since they did the ignition recall. Sometimes switching keys will allow it to start. Dealers have raked her over the coals and really turned me off from buying a newer model jeep of any kind.
As a somewhat decent wrench that owns an 07 nitro with the 3.7 I started to have this issue. It seemed like a fuel issue but I couldn't figure it out. One day I was stuck and it happened. I checked the Schrader to see if there was pressure and there was. Tried to start it and it fired right up. Couldn't believe it. Taught the wife what to do just in case she needed the truck. TLDR trust your gut.
Marvel Mystery Oil in fuel has been working well. 4 oz per tank full. Check engine light even went off. No start condition comes right back if I forget to add the MMO. Still runs rough on occasion but 90% improvement since the MMO. Thank you to the MMO recommendation in these comments!
Hello guys 👋 I have 2005 Jeep grand Cherokee with 3.7 engine , I do have that factory Purge valve on it and I do have the same issue like you guys. Did anybody think about the charcoal canister maybe that thing is clogged or some?
I have a 2009 Jeep Commander with the 3.7 I replaced a battery and starter before seeing this video...this vid fully worked. I appreciate it. I wondered if new injectors and spark might help?
I have a 2009 Jeep Commander, same Engine..I've had this problem for quite some time.Every time I'd drive it at operating temperature, go to the store,start it back up,it runs rough and the check engine light flashes,I was told it was a misfire..Now when it happens, it doesn't start.This is probably one of the issues as well..Ty for the vid..
I seen another video I'm having a hard crank and then start that I'm trying to fix the other video said that you could run a fuel line check valve near the gas tank would prevent the gas from going back into the tank do you think that would work
Love you bro..you freaking nailed it..I burned my starter out doing the same.thing..and had to put a new starter in..thanks for this solution and answer
GENESIS ELI how is she holding up now? R u doing the wrap a rag and flat head release every time it doesn’t start like he advised? This is also my problem for the last month and I replaced the stock starter yesterday w a new one but now the new one cranks really super slow and loud before it starts 🤦🏽♂️ thinking about putting back the old starter since O’Reilly tested my stock starter and it passed the benchmark test nothing wrong w it the “vapor lock” is obv my problem as well on my 07 jgc I might switch the starters back today and just carry a rag & flat head for temporary solution like our main man here suggest ...
Harbor freight has a fuel pres checking kit that has a rubber pipe with the right fitting to go on the fuel rail to push the shader valve you could make a way to let off the fuel pressure .
Right there behind your battery,The purge solenoid is part of the evaporative emissions system that takes the vapor from the tank through a charcoal canister and opens so the vapor is sucked into the intake and burnt rather then released to the atmosphere. Problem is the fuel is boiling due to excessive alcohol content that lowers the boiling point of the fuel .Heat soak is an issue with many .Worked as a Chrysler tech for years back when they had Daimler.We had a TSB ON THE 4.0L and had to add heat shields to the fuel rail and open up the rubber next to the radiator to give it air . Try a different brand of fuel .Different then they were 10 years ago .Try washing out your radiator and condenser fins for better cooling air flow. .There may be a computer reprogram also for this issue maybe .Chrysler is not one to brag about these issues unless you ask.
On a dodge ,nitro exact , can limp mode throw timing off to the point of me having no compression in 4 cylinders? 2 on bank 1 ,2 on bank 2? Please help sounds like u have a lot of experience on Chryslers
@@panzerichi3837 No limp mode will not cause no compression issue on any cylinder . Jumping time will SINCE the 3.7l engine is an interference engine meaning when valve timing goes out piston comes up and hits valves .It does not freewheel when timing chain jumps . Engine probably needs to come apart .Pull the heads and timing chain cover and inspect and see what is still good. Possible piston damage can happen when it hits the valve if your unlucky to be blunt. Hope this helps. Rare instance if the 3 dead cylinders are washed out BY extreme over fueling like 3 stuck open injectors .But you would smell it bad and sometimes I have seen it shoot out the exhaust pipe raw fuel .Serious dangerous situation. You would smell it bad if that were the case .Not for the novice!
@@adamserafini6945 thanks 🙏 I did think it jumped timing did not get rpm readings and the no compression but I didn't know if it was because of limp mode messing with timing and maybe a sensor caused it I did get throttle petal sensor code and thought maybe that's why no rpm reading idk ,but thanks alot I'm going to tear in down,I did smell a little gas but under hood and did crank it twice for a min so I hope not washed out
You earned a Sub buddy! It worked for me have a 07 Jeep Grand Cherokee Landero. I tried swapping the replays, didn’t work, did the gas thing u did in the video, didn’t work at first, left the key on “On” for a minute, sat for 5 min and tried to start it it work!!!! I was stuck at school an hour from home thank you !!
MINE also was not hot gas but it was cold, but there was liquid and air that came out of that part that I had too screw off, I used sissies to push it in becuase that’s all I had
I'm glad it helped! I am currently still using this method. No permanent fix or resolution from Chrysler. I dont look for there to ever be a permanent fix, being that these WKs are 12-13 years old.
After I brought my Jeep to the mechanic to get an oil changed, which I originally planned, they ran the scanner test on it and couldn’t find a thing, nothing was wrong, the code for trans over temp was faulty error code. Now today it happened to me again!!!.... I got up remote start my car (freezing out) drove to school about an hour. Was in class for 2 hours, went outside to go home, and didn’t start.... had to leave it there hoping it starts in the morning, also tried all the same tricks too try and get it started
Would it be possible to strategically place a small fan which has a timer that activates when the ignition is switched off? As I recall some engines have fans that continue to run after the ignition has been switched off.
Just happened to me again today on 3.7 WK GC, the first time it happened was two years ago, this was second time. Right before this happened, I was driving low speed around parking lot, so these were prime conditions for heat buildup, vehicle was parked for about 20 minutes, then no start condition. After three short cranks it started, when its cranking it does sound much worse than vapor lock condition, probably cuz this engine has never cranked more than 1 second in 15 years and always starts no issue, same starter, the drivetrain is military grade with Mercedes W5A580. Thanks for the tip, next time I try this method.
I'm having a similar issue but my jeep will shut off while it's on at low speeds and them iy wont start again took it in to the dealer they had it for 2 weeks to tell me I needed a new battery 🤦♂️
Did you have any issues with an intermittent misfire, i.e. misfires while driving or at a stop light only when the engine is hot? Popping the hood to allow extra airflow in the engine bay helps considerably to alleviate the misfires unless it's really hot outside. Scan tool only shows codes for p0300 (random misfire) and p0201-208 (fuel injector circuit malfunctions). The wiring seems fine, I'm stumped.
Cole, I did not have those issues with my Jeep. However that is a common problem with most modern vehicles that utilize a coil-over-plug system. When coil packs start to go bad, they'll begin to deteriorate on the inside. This causes intermittent misfires only when the engine is hot. The P-0300 code is simply telling you "I know there is an intermittent misfire, but it is not frequent enough to pinpoint which cylinder." If you can, warm the vehicle up and put it in a situation where it will steadily misfire (Running, up to temp, in gear, foot on brake). Let it misfire for a while. The PCM will have to be able to detect a steady misfire to determine the correct cylinder. Once you have this info, replace that coil pack.
thank you so much for this info - I have an 06 same problem and like you said it doesn't show a code for it- any 3.7 v6 engine jeep model vehicle likely has this same problem
My lady friend has the same problem with her 2009 Cherokee and she takes the hose from the filter and put some staring fluid and then start. Wow what a problem. Thank you
I actually ordered a new throttle body this weekend but haven't put it on yet. I think I can return it as long as I don't open or use it. This may save me the money. I will try this first. I was sure it was a bad throttle position sensor but vapor lock would give the same indication so I will try this first. THANK YOU !!!!!
If you have no crank check the ground on the starter relay, or computer componant relay whatever they want to call it. On some the comp will not turn it into a ground if so put a wire on the ground under the fuse box and ground it to the body.
if this problem is on the Wk then its not just 07-10 The Wk ran from 05 -2010.. im curious if its just on The 3.7 or on The Hemis too?? or did they put purge solenoid? on any of them??? i believe it just happened to my jeep not to long ago And i thought it may be a fuel issue and i kept cranking it… my mechanic.. replaced. my EGR VALVE.. now i think my sttarter or my ignition switch is shot??? after seeing this im guessing its my starter.. but Thank you so much for the insight…
So im going to say this if this might help try copper or aluminum clips around the entire fuel line instead of plastic. It could actually eliminate the problem because of its heat dispacing qualities, it may also be prudent to put some sort of polymer/plastic jacketing over the those clips to get the reduction in top heat. Try it out.
Yes, I know I wasnt using proper terminology. That purge valve does practically nothing. There is no return to tank from the fuel rail anywhere. By "purge valve" I'm referring to the return system.
Pull windshield cowl rubber strip off. It will allow air flow to vent out from engine department. Only issue doing that you will experience leaves and water will get into engine department but not too big of an issue.
Thank you so much for the info. I was about to drop my fuel tank and change out the fuel pump. Ive had this problem intermittently for a while. I just recently cut off my huge muffler and welded on a 18 inch glass pack. Havent had the problem since.... The wk now runs a lot better. Great video
I'm wondering , did you ever put a code reader on it ? My 07 does pretty much the same thing and I am going to try this, but I have a brand new code reader and mine throws NO codes
Sounds like a fuel delivery problem, or possibly a sensor failure. Do you have a check engine light on? If so, have the codes read and it'll more than likely tell you exactly what it is. If no CEL is on, it may simply be a fuel pump relay or the fuel pump itself.
That valve you push on is called a Schrader Valve. It is the same as AC hoses to a manifold for checking the pressure in the system. So go to NAPA and get a replacement hose. That wont solve your problem, but, now you will have something that will fit that valve. Happy Hunting.
Mike, I don't think so. This issues is caused by excess heat. A cold Crank/No start could be caused by several different components. I would recommend having the vehicle checked over by a reputable mechanic.
This definitely is the same problem im having. I'm going to try to change the fuel pump and what ever else I can find to replace and if nothing works ill try to come up with something to cool off the line as creative i can be. Im sure the trucks from the factory didn't have this issue so im going to look into it deep
Try next time try changing the water thermostat to a 180-degree. Any less temp will make an engine check light to come on. Also, you can change the radiator from a two core to a 4 core aluminum. This will make your engine run a lot cooler and last longer.
my friend has this issue and all the mechanics tell her to replace her starter. hers always eventually starts. she eventually figured out to put the key in the on position and hold it there for a bit so the fuel pump circulates the fuel. it will then start. maybe try that before getting in the engine. also, in the old days when my VW Rabbit would vapor lock I would open the gas cap. would that help? I would also open the hood to cool the engine. thanks for your video!
I’ve heard many say to replace the starter. The actual issue there is the starter solenoid wire, not the starter itself. I tried that repair with no luck. I would also cycle key to run the fuel pump, but that didn’t work for me either.
I was just very excited to hear that I won't be sick in this parking lot for long. I tried the trick, hot gas outta the valve, still won't start. I did have a coolant issue that. Happened about the same time. As this not starting thing happened Got the hoses replaced that were leaking coolant. After that it only Didn't start a few times, and 2nd or 3rd try it would crank up. Not. This time
After an hour from that post and draining that valve couple times it started. Since then if wouldn't start when it was warm and on a cold start. Anyone know what else it could be?
Just inherited an 07 3.6L Commander and have been having the same issues since it was my parents. Any updates on permanent fixes or word on how the Marvel Mystery Oil might help? Perfect running car other than this!
No updates currently. The only thing that somewhat helps is running Ethanol Free fuel (straight gas). Aside from that, I'm still having intermittent issues and use this temporary fix. Chrysler has been of no assistance at all, even the engineering dept. Basically I've been told that it is a 10+ year old vehicle and they are not required by law to produce parts and/or recall for any non-safety related issues. So basically, we are stuck with what we've got.
@@CCWP0251 i owns the same kind but mines is an 06 which it does the same thing.. once u shut the vehicle down u can hear it blowing bk to the tank but nobody seems to know why but overall its very dependable i had it for 2 yrs now and another problem im experiencing is sluggish acceleration sometimes whn its in park it will rev up on its own as if i pressed the gas i still cant figure it out what causing that problem unless its the throttle body or cable
@@028tyrone mine is an 08 and you mentioned all the same issues I experience. Love the car. Just weird issues here and there. It’ll lock and unlock by itself like I used the key or someone else’s key worked on mine.
@3208catbird Best believe I would have sent a lot of lead through that window at 1200fps if I was in that situation. I agree, this is definitely a safety issue. Not to mention if you keep cranking, the starter can catch fire. What if you had kids in the car and the engine bay suddenly ignites? Not a good thing at all. I'm glad your wife is okay!!
tried a purge solenoid /valve canister and it didnt fix it/ what about some type of inline fuel filter or inline check valve-also iI had a new fuel pump put in a yr back and its now making a buzzing sound as well/ the pressure release is a quick fix make sure you spray water around that area and carry more than one fire extinguishers.
Have the exact same vehicle and the same problem I dump in some heat into the gas tank and let it sit for 10 minutes and then it fires right back up no problem but it sucks and it only happens to me in the winter time in his vehicle that's the only damn time it happens and it's a pain in the ass......
I cannot believe this for a minute I think what you’re dealing with is a sensor on the vehicle that shut the vehicle off from running it gets heat soaked when the vehicle is shut off and this showing a higher temperature then what the engine actually is these engines have a electronic cooling fan which is controlled by sensor that may be malfunctioning as well totally impossible to get vapor lock in that fuel rail design just a thought get a diagnostic tool shut the vehicle off after running it and check the temperatures on the sensors
going to try this next time i have the issue. I solved it while i was stuck in a parking lot with a shot of brake cleaner up the intake and it started right up.
My 2008 patriot will start every time whenever and wherever with the Avital remote starter that's hooked up 2 it but using the keys is an intermittent problem when the motor is warm as.well
Not entirely. I do agree that Ethanol burns hotter, which is contributing to the issue. Running straight non-ethanol gas tends to make the issue less common. However I still believe the issue is the lack of return to the tank. That alone would solve the issue entirely, but unfortunately it isn't a part produced by Chrysler. One could probably engineer his own though. 🤷♂️
@@kevinhuguet9675 The octane level of the fuel you choose really doesn't matter much anymore. In regards to this issue, you want to look at the ethanol percentage. Must are "up to 10%" ethanol. Running "straight gas" is better, yet more expensive. This will still be an 87 octane fuel, just ethanol free. Not all stations carry it.
2 things, one is I was having same issue, after a drive and making multiple stops my jeep wouldn't start for quite some time.. I just recently purchased a fuel pump, dropped the tank and swapped pump.. so far, no longer having this issue... second is there is a purge solenoid that can also be issue.. solenoid is right next to fuse box.. I also just swapped .. but I think a new fuel pump fixed my issue.. changed purge solenoid just because, my vehicle is an 09 with 230k miles so I figure it'll soon go anyway.. easy swap for solenoid
Need some more specifics. If it's the 4.0 In-Line 6 cylinder, chances are it could be this very issue. I have seen it happen with those motors as well. However it could be a fuel delivery issue (i.e: Fuel pump, or check valve on the fuel pump) which is designed to hold pressure in the lines. Could also be as simple as a stopped up fuel filter.
It’s a 91 Jeep Cherokee I changed the map sensor. crank positionsensor. fuel pressure regulator. coil. Spark plugs. Fuel pump. O2 sensor and it the the same thing over and over it will start right up the first time I turn it off and try to turn it back one and that’s when the problem begins I have to pump the gas till it turns on sometimes it takes me up to 5 min to turn it on
I’m planning on getting a Jeep Liberty 05/07 with the 3.7 l engine in it. As I was watching your video I came to wonder if the Liberties have that same problem or just the Grand Cherokee? Thanks and very informative video.
@@CCWP0251 Thank you. If you don't do what you show, how long would it take to resolve on it's own. I had this happen to me today before seeing this video and even after letting it sit for 4 hours and the time it took to tow it still did not start but cranked. The other times it happened, it usually started after an hour or two of waiting.
@@kens976 With my vehicle, once the temperature gauge reads at the 1/4 mark, it will start. Anything above that and it will not. Normally I would have to let mine sit for 30 minutes to an hour depending on outside temp. But you can simply turn the key to the "ON" position and see where the temperature gauge stops. If it is at the first line or lower, it'll start.
@@CCWP0251 ok I must have a different issue then as my temp was all the way to cold and it just cranked buy didn't start. Thanks again, I will keep this in mind if it happens again
@@CCWP0251 I Have this same issue in my 08 Liberty. There is a thick soft insulation under the hood. Would it help if I removed that so some heat could get out?
@@emilybutlervic I wouldn't recommend removing the under-hood insulation. While it may increase heat in warmer weather, it is also there to hold in heat during winter. However if you would like, you can have hood vents installed to help dissipate heat. I debated adding hood vents, but mine is about to get traded in for a new ride.
Life saver. Was stuck out in the woods and luckily your video loaded. Thanks buddy
Holy fuck I’m stranded at a gas station watching this and still waiting for the part where you explain the fix
He explained it lol 😂 told you what you need for a temporary fix, he then said he don't know exactly what to do for a permanent fix 😂😂😂😂
Fuck he can talk 😂😂😂😂
Thank you. Helped my friend out. He had a few failed sensors. All start related. After a while it had trouble starting. Once it started we let it run for a little while then turned it off to pickup and put some tools away. After a while the car wouldn’t start. Found this video and purged some fuel. It started right away. He’s going to buy a fancy screwdriver to put on his keychain. 2008 Jeep Commander
What sensors were failed
From Port Elizabeth, South Africa. Thank you for taking the time out to make this video and sharing this valuable experience
Solution starts around 5:20, but the rest is very valuable information
Thanks
Thank you for this video. This issue has perplexed me for some time.
Wow thanks for this video I was able to get a guy stranded at a gas station back on the road. No bs straight to the point thank you sir!
Omg..
Thank you so much , my 2010 jeep has done this twice now. I appreciate this so much.
Amazing! Thank you so much!!! This JUST happened to me twice today!!! LIFE SAVER!!!
This seems to be the exact issue with I am dealing with. I am hoping this works and thanks for the insight.
Thank you very much for the information just finished work jumped in my vehicle could not get it started was thinking it was fluid pump gas filter so I left my vehicle on my job thank you so much for that information
Yeah I had same problem on 2010 jeep liberty 3.7 liter engine. Spent $5400 at the dealer for new PCM, new left block with cracked head gasket. 1 month later back to the same problem. Thanks you 🙏 for the answer. I’ve done so much electrical troubleshooting and came back to ASD relay and that’s why the PCM was replaced
Thank you. great video!!!!
I had this problem on my for the past 3 years 2008 jeep with 350,000 miles, I think the main issues is the that engine is running to hot, keep your temp gage under 1/2 after running, I had this happen when my thermostat was faulty, the second time was when antifreeze was low. every time the temp gage went over 1/2 I had this problems
Good morning My son has the same issue on his 08 jeep Grand Cherokee 3.7 As A Mechanic for over 47 yrs. i had these issues back in the Day... so i tryed so old school troubleshooting, i ran an aux fan to a switch & relay to this fan and let it run as car is running , i also hooked up a pressure tester with gauge & release button, and finally i installed a cold air intake to get rid of that hot closing filter cover. My son is driving her and we will be testing this out for one week.. will get you info. thanks for your video..
Love to see more of these videos that exactly point the issue. Thanks brother
Glad I came to this video, I have resolved this issue a few years ago, by just adding non ethanol fuel to the tank; those new gasoline mixes contains crazy amounts of ethanol (I live in Florida and gets pretty hot) while resting in the hot rails ethanol will boil at a lower point than just regular pure gasoline and therefore create vapor lock. Of course non ethanol fuel is extremely expensive especially right now, I simply add a can or two of seafoam to neutralize the ethanol and avoid vapor lock. Hope my 2 cents help! 😁
G B,
I agree non-ethanol fuel helps. I run it in all of my small engine equipment and our 1930 Model A. It works great. Unfortunately it would be crazy expensive to constantly put in a daily driver. I did try it, but the fuel cost was astronomical.
Wow very good job sr l learne something today 😅
My mom has a jeep grand cherokee 08 and air just checked it out today to find it has what I believe to be the same problem. I'll will definitely give this little trick a try. Thank you sir.
Did it work?
2008 Jeep Grand Cherokee Laredo with failed start on first go but always starts on the second with no signs of working overtime for the second crank. It almost sounds as if the engine didn’t turn over fully but cranks and turns over just fine any other time when starting from cold. Only happens when the truck is up to running temp.
I have had this problem for years with my wifes 2007 Jeep Grand Cherokee. It would be intermittent and yesterday I think I found the cause. The producer of this video of this correct it is indeed vapor lock, but check your coolant level! I had a leaking water pump- and this caused my Jeep to began doing this no start but crank condition. While replacing this water pump, I also decided to flush my coolant system. After installing the new pump I began to refill the system with coolant. I took the car for a ride, and noticed it was getting hotter than normal due to a air pocket in the coolant system. This really aggravated the no start symptom (vapor lock).- worse than ever before! Once I completely filled the coolant the car was fine the rest of the day. Having low coolant would effect the temperature of the intake manifold and the fuel rails are right there. So in short- YES this is vapor lock, but check your coolant system for the proper coolant level- this will allow the temp to stay low. This is why these cars did not due this when new. Once leaks develop, or fluid levels are not correct, the temp will rise and cause the vapor lock.
In fact this is the 3rd water pump I have installed, and all my crank but no starts started happening when these pumps began leaking.
I have a 2007 jeep commander with this same issue & it looks like we have same motor so I bet I'm in the same boat with you & thank you for this temp fix
Same, mine has the 3.7 and I just bought mine 2 days ago, was gonna take it back to the dealer tomorrow but now that I’ve seen this I don’t know what to do
thank you it was driving me up a wall, now i just let the pressure out and bam starts right up. I thought i knew a lot put engines in put the valve body in to fix the going into limp mode. so, thanks again.
I got foam pipe insulation and wrapped the fuel rail including any fuel lines under the hood ..it helps lots .
Living in Florida .. got the tip from a old timer... Jeep mechanic
I’m not alone! Thank you for identifying the real issue.
No problem. To be truthful, mine just got traded in over this very issue. I got tired of it leaving my wife stranded. Hope the video helped. 👍
@@CCWP0251 Thank you for this vid. The frustration of this happening is overwhelming especially at a time like this. Sometimes ill disconnect battery thinking itll work but nope. It randomly starts whenever it wants even after replacing battery ,starter , & alternator.
Thank you!!! Life saver having this same problem
My sisters 07 Jeep Cherokee showed same signs of vapor lock and doing this allowed her to get it started. However she has also had issues with the theft deterrent system since they did the ignition recall. Sometimes switching keys will allow it to start. Dealers have raked her over the coals and really turned me off from buying a newer model jeep of any kind.
My car gets turned on my other people’s keys. Locked and unlocked too. Is that what you mean?
As a somewhat decent wrench that owns an 07 nitro with the 3.7 I started to have this issue. It seemed like a fuel issue but I couldn't figure it out. One day I was stuck and it happened. I checked the Schrader to see if there was pressure and there was. Tried to start it and it fired right up. Couldn't believe it. Taught the wife what to do just in case she needed the truck. TLDR trust your gut.
What does that mean checked the Schrader??? Having same issue rn after a car wash
I'm having the same issue. What about heat shield tape? Would that help at all?
Having this issue with a 2006 Grand Cherokee 3.7. Thanks for the video
U doing the rag cover n release trick? How is she doing atm?
Marvel Mystery Oil in fuel has been working well. 4 oz per tank full. Check engine light even went off. No start condition comes right back if I forget to add the MMO. Still runs rough on occasion but 90% improvement since the MMO. Thank you to the MMO recommendation in these comments!
Hello guys 👋
I have 2005 Jeep grand Cherokee with 3.7 engine , I do have that factory Purge valve on it and I do have the same issue like you guys. Did anybody think about the charcoal canister maybe that thing is clogged or some?
I have a 2009 Jeep Commander with the 3.7
I replaced a battery and starter before seeing this video...this vid fully worked. I appreciate it.
I wondered if new injectors and spark might help?
You just need maximum cooling, so keep your oil fresh, get the correct coolant, and if you still have it, maybe try other thermostats or radiators
Loved the video brother very informative.. Did you by any chance find an alternative solution or hack for a more permanent fix..
I have a 2009 Jeep Commander, same Engine..I've had this problem for quite some time.Every time I'd drive it at operating temperature, go to the store,start it back up,it runs rough and the check engine light flashes,I was told it was a misfire..Now when it happens, it doesn't start.This is probably one of the issues as well..Ty for the vid..
I seen another video I'm having a hard crank and then start that I'm trying to fix the other video said that you could run a fuel line check valve near the gas tank would prevent the gas from going back into the tank do you think that would work
Love you bro..you freaking nailed it..I burned my starter out doing the same.thing..and had to put a new starter in..thanks for this solution and answer
Glad I could help!
GENESIS ELI how is she holding up now? R u doing the wrap a rag and flat head release every time it doesn’t start like he advised? This is also my problem for the last month and I replaced the stock starter yesterday w a new one but now the new one cranks really super slow and loud before it starts 🤦🏽♂️ thinking about putting back the old starter since O’Reilly tested my stock starter and it passed the benchmark test nothing wrong w it the “vapor lock” is obv my problem as well on my 07 jgc I might switch the starters back today and just carry a rag & flat head for temporary solution like our main man here suggest ...
Harbor freight has a fuel pres checking kit that has a rubber pipe with the right fitting to go on the fuel rail to push the shader valve you could make a way to let off the fuel pressure .
Right there behind your battery,The purge solenoid is part of the evaporative emissions system that takes the vapor from the tank through a charcoal canister and opens so the vapor is sucked into the intake and burnt rather then released to the atmosphere. Problem is the fuel is boiling due to excessive alcohol content that lowers the boiling point of the fuel .Heat soak is an issue with many .Worked as a Chrysler tech for years back when they had Daimler.We had a TSB ON THE 4.0L and had to add heat shields to the fuel rail and open up the rubber next to the radiator to give it air . Try a different brand of fuel .Different then they were 10 years ago .Try washing out your radiator and condenser fins for better cooling air flow. .There may be a computer reprogram also for this issue maybe .Chrysler is not one to brag about these issues unless you ask.
On a dodge ,nitro exact , can limp mode throw timing off to the point of me having no compression in 4 cylinders? 2 on bank 1 ,2 on bank 2? Please help sounds like u have a lot of experience on Chryslers
@@panzerichi3837 No limp mode will not cause no compression issue on any cylinder . Jumping time will SINCE the 3.7l engine is an interference engine meaning when valve timing goes out piston comes up and hits valves .It does not freewheel when timing chain jumps . Engine probably needs to come apart .Pull the heads and timing chain cover and inspect and see what is still good. Possible piston damage can happen when it hits the valve if your unlucky to be blunt. Hope this helps. Rare instance if the 3 dead cylinders are washed out BY extreme over fueling like 3 stuck open injectors .But you would smell it bad and sometimes I have seen it shoot out the exhaust pipe raw fuel .Serious dangerous situation. You would smell it bad if that were the case .Not for the novice!
@@adamserafini6945 thanks 🙏 I did think it jumped timing did not get rpm readings and the no compression but I didn't know if it was because of limp mode messing with timing and maybe a sensor caused it I did get throttle petal sensor code and thought maybe that's why no rpm reading idk ,but thanks alot I'm going to tear in down,I did smell a little gas but under hood and did crank it twice for a min so I hope not washed out
thank you! my 2010 jeep liberty has this problem in the heat
What about insulating the fuel rail? Not sure if you tried this.
My old 66VWBeetle would vapor lock. We just put a few wooden clothes pins on the line to keep the heat dissipated. Might work...
If the cherokee has been sitting for a few days this would not be an issue correct?
I’ve also learned that you can spray throttle body cleaner in the intake to get the car back started up.
You earned a Sub buddy! It worked for me have a 07 Jeep Grand Cherokee Landero. I tried swapping the replays, didn’t work, did the gas thing u did in the video, didn’t work at first, left the key on “On” for a minute, sat for 5 min and tried to start it it work!!!! I was stuck at school an hour from home thank you !!
MINE also was not hot gas but it was cold, but there was liquid and air that came out of that part that I had too screw off, I used sissies to push it in becuase that’s all I had
I'm glad it helped! I am currently still using this method. No permanent fix or resolution from Chrysler. I dont look for there to ever be a permanent fix, being that these WKs are 12-13 years old.
After I brought my Jeep to the mechanic to get an oil changed, which I originally planned, they ran the scanner test on it and couldn’t find a thing, nothing was wrong, the code for trans over temp was faulty error code. Now today it happened to me again!!!.... I got up remote start my car (freezing out) drove to school about an hour. Was in class for 2 hours, went outside to go home, and didn’t start.... had to leave it there hoping it starts in the morning, also tried all the same tricks too try and get it started
I have a 2006 jeep commander. Can this be the same issue
Would it be possible to strategically place a small fan which has a timer that activates when the ignition is switched off? As I recall some engines have fans that continue to run after the ignition has been switched off.
Just happened to me again today on 3.7 WK GC, the first time it happened was two years ago, this was second time. Right before this happened, I was driving low speed around parking lot, so these were prime conditions for heat buildup, vehicle was parked for about 20 minutes, then no start condition. After three short cranks it started, when its cranking it does sound much worse than vapor lock condition, probably cuz this engine has never cranked more than 1 second in 15 years and always starts no issue, same starter, the drivetrain is military grade with Mercedes W5A580. Thanks for the tip, next time I try this method.
I'm having a similar issue but my jeep will shut off while it's on at low speeds and them iy wont start again took it in to the dealer they had it for 2 weeks to tell me I needed a new battery 🤦♂️
Would an aftermarket transmission cooler work?
This applies to Jeeps in '06 too...the "Jeep 65". Gonna try this .
I had that problem today. Any other solutions other than this?🤷♂️
My valve doesn't have a cover. Could that be an issue?
Did you have any issues with an intermittent misfire, i.e. misfires while driving or at a stop light only when the engine is hot? Popping the hood to allow extra airflow in the engine bay helps considerably to alleviate the misfires unless it's really hot outside. Scan tool only shows codes for p0300 (random misfire) and p0201-208 (fuel injector circuit malfunctions). The wiring seems fine, I'm stumped.
Cole,
I did not have those issues with my Jeep. However that is a common problem with most modern vehicles that utilize a coil-over-plug system. When coil packs start to go bad, they'll begin to deteriorate on the inside. This causes intermittent misfires only when the engine is hot. The P-0300 code is simply telling you "I know there is an intermittent misfire, but it is not frequent enough to pinpoint which cylinder." If you can, warm the vehicle up and put it in a situation where it will steadily misfire (Running, up to temp, in gear, foot on brake). Let it misfire for a while. The PCM will have to be able to detect a steady misfire to determine the correct cylinder. Once you have this info, replace that coil pack.
thanks for your help
That just saved my ass from being stuck a loooooong way from home Godspeed sir!
Glad I could help!
thank you so much for this info - I have an 06 same problem and like you said it doesn't show a code for it- any 3.7 v6 engine jeep model vehicle likely has this same problem
My lady friend has the same problem with her 2009 Cherokee and she takes the hose from the filter and put some staring fluid and then start. Wow what a problem. Thank you
I just bought a 2007 Jeep commander and it just started doing this. I wish I knew about this before I bought it.
Your purge valve is in front of the fuse box I can see it in your video
I actually ordered a new throttle body this weekend but haven't put it on yet. I think I can return it as long as I don't open or use it. This may save me the money. I will try this first. I was sure it was a bad throttle position sensor but vapor lock would give the same indication so I will try this first. THANK YOU !!!!!
I replaced throdel body,tps,spark plugs, oxygen sensor coils just did what he said on the video,vacuum air hoses any other ideas?
If you have no crank check the ground on the starter relay, or computer componant relay whatever they want to call it. On some the comp will not turn it into a ground if so put a wire on the ground under the fuse box and ground it to the body.
if this problem is on the Wk then its not just 07-10 The Wk ran from 05 -2010.. im curious if its just on The 3.7 or on The Hemis too?? or did they put purge solenoid? on any of them??? i believe it just happened to my jeep not to long ago And i thought it may be a fuel issue and i kept cranking it… my mechanic.. replaced. my EGR VALVE.. now i think my sttarter or my ignition switch is shot??? after seeing this im guessing its my starter.. but Thank you so much for the insight…
So im going to say this if this might help try copper or aluminum clips around the entire fuel line instead of plastic. It could actually eliminate the problem because of its heat dispacing qualities, it may also be prudent to put some sort of polymer/plastic jacketing over the those clips to get the reduction in top heat. Try it out.
So good news is we finally know what the issue is. Bad news is there is no way to fix it?
Landon Ashby your are one smart cookie we put thank you use premium gas and and marvel mystery oil in fuel fixed this problem wife happy
Really?
Qqqqqqqqqqqqqqqq
Bro u just saved my ass thank u
The purge valve is the round thing by your fuse box! Dorman 911-212 Vapor canister purge valve...
Yes, I know I wasnt using proper terminology. That purge valve does practically nothing. There is no return to tank from the fuel rail anywhere. By "purge valve" I'm referring to the return system.
Thank you so much. You just saved me from getting a new fuel pump only to still have the issue.
Wow
@@peterl6095 how did you figure your Jeep’s problems out? I saw your videos and I’m having the same problems.
I changed my fuel pump out and fixed the issue
Pull windshield cowl rubber strip off. It will allow air flow to vent out from engine department. Only issue doing that you will experience leaves and water will get into engine department but not too big of an issue.
Thank you so much for the info. I was about to drop my fuel tank and change out the fuel pump. Ive had this problem intermittently for a while. I just recently cut off my huge muffler and welded on a 18 inch glass pack. Havent had the problem since.... The wk now runs a lot better. Great video
I'm wondering , did you ever put a code reader on it ? My 07 does pretty much the same thing and I am going to try this, but I have a brand new code reader and mine throws NO codes
Kenneth, mine never threw a single code either. The only thing it would do is flash “Transmission Over Temp” on the dash while cranking.
Wow it work. Thanks
Mine is a 06 with a 4.7 and it cranks, but won't start even when it's cold what can I do to fix it
Sounds like a fuel delivery problem, or possibly a sensor failure. Do you have a check engine light on? If so, have the codes read and it'll more than likely tell you exactly what it is. If no CEL is on, it may simply be a fuel pump relay or the fuel pump itself.
That valve you push on is called a Schrader Valve. It is the same as AC hoses to a manifold for checking the pressure in the system. So go to NAPA and get a replacement hose. That wont solve your problem, but, now you will have something that will fit that valve. Happy Hunting.
Thanks. 2009 lardeo same problem
I was working on a 2010 Jeep commander 3.7 L. It was not vapor lock. I tried it four times. I was four miles from my house when it happen
do you think that would cause a cold ...crank no start?
Mike, I don't think so. This issues is caused by excess heat. A cold Crank/No start could be caused by several different components. I would recommend having the vehicle checked over by a reputable mechanic.
This definitely is the same problem im having. I'm going to try to change the fuel pump and what ever else I can find to replace and if nothing works ill try to come up with something to cool off the line as creative i can be. Im sure the trucks from the factory didn't have this issue so im going to look into it deep
Try next time try changing the water thermostat to a 180-degree.
Any less temp will make an engine check light to come on. Also, you can change the radiator from a two core to a 4 core aluminum. This will make your engine run a lot cooler and last longer.
Do you have specific website, I can buy this upgraded 4 core radiator?
my friend has this issue and all the mechanics tell her to replace her starter. hers always eventually starts. she eventually figured out to put the key in the on position and hold it there for a bit so the fuel pump circulates the fuel. it will then start. maybe try that before getting in the engine. also, in the old days when my VW Rabbit would vapor lock I would open the gas cap. would that help? I would also open the hood to cool the engine. thanks for your video!
I’ve heard many say to replace the starter. The actual issue there is the starter solenoid wire, not the starter itself. I tried that repair with no luck. I would also cycle key to run the fuel pump, but that didn’t work for me either.
Maybe get a fitting for a fuel guage that fits it. Rig up a hose from that to a bottle of some sort.
I was just very excited to hear that I won't be sick in this parking lot for long. I tried the trick, hot gas outta the valve, still won't start. I did have a coolant issue that. Happened about the same time. As this not starting thing happened
Got the hoses replaced that were leaking coolant. After that it only Didn't start a few times, and 2nd or 3rd try it would crank up. Not. This time
After an hour from that post and draining that valve couple times it started. Since then if wouldn't start when it was warm and on a cold start. Anyone know what else it could be?
Just inherited an 07 3.6L Commander and have been having the same issues since it was my parents. Any updates on permanent fixes or word on how the Marvel Mystery Oil might help? Perfect running car other than this!
No updates currently. The only thing that somewhat helps is running Ethanol Free fuel (straight gas). Aside from that, I'm still having intermittent issues and use this temporary fix. Chrysler has been of no assistance at all, even the engineering dept. Basically I've been told that it is a 10+ year old vehicle and they are not required by law to produce parts and/or recall for any non-safety related issues. So basically, we are stuck with what we've got.
@@CCWP0251 i owns the same kind but mines is an 06 which it does the same thing.. once u shut the vehicle down u can hear it blowing bk to the tank but nobody seems to know why but overall its very dependable i had it for 2 yrs now and another problem im experiencing is sluggish acceleration sometimes whn its in park it will rev up on its own as if i pressed the gas i still cant figure it out what causing that problem unless its the throttle body or cable
@@028tyrone mine is an 08 and you mentioned all the same issues I experience. Love the car. Just weird issues here and there. It’ll lock and unlock by itself like I used the key or someone else’s key worked on mine.
I have the same exact vehicle, I'm gonna look into an electronic valve with a switch on the dash
@3208catbird Best believe I would have sent a lot of lead through that window at 1200fps if I was in that situation. I agree, this is definitely a safety issue. Not to mention if you keep cranking, the starter can catch fire. What if you had kids in the car and the engine bay suddenly ignites? Not a good thing at all. I'm glad your wife is okay!!
tried a purge solenoid /valve canister and it didnt fix it/ what about some type of inline fuel filter or inline check valve-also iI had a new fuel pump put in a yr back and its now making a buzzing sound as well/ the pressure release is a quick fix make sure you spray water around that area and carry more than one fire extinguishers.
also my fuel pump is now making a humming noise-replaced it last yr
Have the exact same vehicle and the same problem I dump in some heat into the gas tank and let it sit for 10 minutes and then it fires right back up no problem but it sucks and it only happens to me in the winter time in his vehicle that's the only damn time it happens and it's a pain in the ass......
back in the day had a 56 ford had to rap fuel line wiyh aluminum foil
I cannot believe this for a minute I think what you’re dealing with is a sensor on the vehicle that shut the vehicle off from running it gets heat soaked when the vehicle is shut off and this showing a higher temperature then what the engine actually is these engines have a electronic cooling fan which is controlled by sensor that may be malfunctioning as well totally impossible to get vapor lock in that fuel rail design just a thought get a diagnostic tool shut the vehicle off after running it and check the temperatures on the sensors
going to try this next time i have the issue. I solved it while i was stuck in a parking lot with a shot of brake cleaner up the intake and it started right up.
My 2008 patriot will start every time whenever and wherever with the Avital remote starter that's hooked up 2 it but using the keys is an intermittent problem when the motor is warm as.well
Hey Jordan- Do you agree with the premium gas/mystery oil thread below?
Not entirely. I do agree that Ethanol burns hotter, which is contributing to the issue. Running straight non-ethanol gas tends to make the issue less common. However I still believe the issue is the lack of return to the tank. That alone would solve the issue entirely, but unfortunately it isn't a part produced by Chrysler. One could probably engineer his own though. 🤷♂️
@@CCWP0251 should I not be running 93?
@@kevinhuguet9675 The octane level of the fuel you choose really doesn't matter much anymore. In regards to this issue, you want to look at the ethanol percentage. Must are "up to 10%" ethanol. Running "straight gas" is better, yet more expensive. This will still be an 87 octane fuel, just ethanol free. Not all stations carry it.
My 2010 Jeep Cherokee is having this exact issue!
2 things, one is I was having same issue, after a drive and making multiple stops my jeep wouldn't start for quite some time.. I just recently purchased a fuel pump, dropped the tank and swapped pump.. so far, no longer having this issue... second is there is a purge solenoid that can also be issue.. solenoid is right next to fuse box.. I also just swapped .. but I think a new fuel pump fixed my issue.. changed purge solenoid just because, my vehicle is an 09 with 230k miles so I figure it'll soon go anyway.. easy swap for solenoid
I have a 91 Jeep do you guys know why I have to give it a lot of gas in odder for it to star
Need some more specifics. If it's the 4.0 In-Line 6 cylinder, chances are it could be this very issue. I have seen it happen with those motors as well. However it could be a fuel delivery issue (i.e: Fuel pump, or check valve on the fuel pump) which is designed to hold pressure in the lines. Could also be as simple as a stopped up fuel filter.
It’s a 91 Jeep Cherokee I changed the map sensor. crank positionsensor. fuel pressure regulator. coil. Spark plugs. Fuel pump. O2 sensor and it the the same thing over and over it will start right up the first time I turn it off and try to turn it back one and that’s when the problem begins I have to pump the gas till it turns on sometimes it takes me up to 5 min to turn it on
@@brianjorge5360 try checking the back wiring harness for bolt rubbing damage.
It’s 30 years old. Just needs a little nudge.
My mom has a 07 grand cherokee with the v6 and it does this crazy crank like a missfire and grinding. I was thinking of replacing the fuel pump
Did it help.
I got one doing the same thing.
Misfiring, cranking rough, iding terrible. Only after warmed up.
I’m planning on getting a Jeep Liberty 05/07 with the 3.7 l engine in it. As I was watching your video I came to wonder if the Liberties have that same problem or just the Grand Cherokee? Thanks and very informative video.
@frank1992 To my knowledge, all 3.7 engines from 07-10 have the issue. Thanks!
I have a 2012 Jeep Liberty that I believe has the exact same issue
Yes they dp
I have the same problem on my 06 jeep
Change the electrical wires and change the tubing smaller allowing pressure cut n weld
I don't understand what you mean???
It does have a purge solenoid, it's right next to the battery, directly behind the positive terminal!!!!!
Thank youuuuuuuu!!!!!!!!!
doesnt work never started
is this also valid for the 2006 jeep commander 3.7L.....I have had the same issue and no one can figure it out.
Yes. Any model around this year with the 3.7 would be prone to the same issue.
@@CCWP0251 Thank you. If you don't do what you show, how long would it take to resolve on it's own. I had this happen to me today before seeing this video and even after letting it sit for 4 hours and the time it took to tow it still did not start but cranked. The other times it happened, it usually started after an hour or two of waiting.
@@kens976 With my vehicle, once the temperature gauge reads at the 1/4 mark, it will start. Anything above that and it will not. Normally I would have to let mine sit for 30 minutes to an hour depending on outside temp. But you can simply turn the key to the "ON" position and see where the temperature gauge stops. If it is at the first line or lower, it'll start.
@@CCWP0251 ok I must have a different issue then as my temp was all the way to cold and it just cranked buy didn't start. Thanks again, I will keep this in mind if it happens again
How about insulating the fuel rail
I have tried that. Unfortunately the insulation traps heat just as well as it deflects.
@@CCWP0251 I Have this same issue in my 08 Liberty. There is a thick soft insulation under the hood. Would it help if I removed that so some heat could get out?
@@emilybutlervic I wouldn't recommend removing the under-hood insulation. While it may increase heat in warmer weather, it is also there to hold in heat during winter. However if you would like, you can have hood vents installed to help dissipate heat. I debated adding hood vents, but mine is about to get traded in for a new ride.