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  #1  
Old 04-18-2016, 08:13 PM
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2008 jgc starting problems

hi from the sunny okanagan valley. my problem with my jeep is when it's warmed up when you shut it off and let it sit for about 10-15 min it won't start till about the 6th-7th try i've changed the fuel pump,crankshaft sensor,camshaft sensor,temp sensor.it has always started when cold,could the pcm be over heating? it runs great when it starts any ideas it does turn over fast when trying to start it

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Old 04-18-2016, 08:55 PM
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Re: 2008 jgc starting problems

It almost sounds like your getting a bit of vapour lock in your fuel tank. I had this happen on a different vehicle I had and it turned out that the line going to the charcoal cannister had a slight kink in it, so when it was warm the vapours weren't getting out fast enough. My fix was replacing the line and I went a hair bigger on it just to be sure. Gas needs to be vented so the fumes don't build up too much so there is normally 3 lines off your fuel tank.
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Old 04-19-2016, 10:29 AM
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Re: 2008 jgc starting problems

thank you for your advise,I'll check that out and get back to you to let you know what happens. I forgot to mention it doesn't leave any codes
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Old 04-19-2016, 09:40 PM
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Re: 2008 jgc starting problems

You mentioned that you changed a temperature sensor, i presume that you where talking about the inlet temperature sensor?
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Old 04-19-2016, 10:02 PM
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Re: 2008 jgc starting problems

No not a temp sensor , a line that was kinked so it was building back pressure from the fumes. It would run fine then you would park for a bit then it was hard to start unless you let it sit for 5-10 minutes with the hood open. It eventually let some of the pressure through , and this only happened when it was warmer out due to heat expansion in the fuel. That gas vapor needs to vent , some have a charcoal canister under the hood , and some have that and/or just a little vent line right off the tank with a little plastic piece in the end , kind of like a check valve to keep water out but let the vapor out of the tank.If you follow the lines off your tank you should see your fill going to your gas cap , a supply and return to your throttle body and one either off the tank itself or going under the hood also for a vent.
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Old 04-19-2016, 11:26 PM
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Re: 2008 jgc starting problems

The question regarding the sensor was for mopar guy, he did mention a temp sensor in his first post.
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Old 04-20-2016, 10:16 AM
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Re: 2008 jgc starting problems

it was the engine coolant temp sensor, I'm going to look at my evap system today like barak mentioned let you all know what happens
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Old 04-20-2016, 09:41 PM
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Re: 2008 jgc starting problems

Well I checked the evap lines they all look good I think I'll replace theevap filter and maybe the pump can't take it to the dealer with no codes they would probably do trial and error too so I might as well do it
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Old 04-20-2016, 10:43 PM
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Re: 2008 jgc starting problems

The inlet temperature sensor could be the problem. If you have a scanner which shows live data, you can monitor the temperature and see if the sensor is off.
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