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Car Forum / Jeep / August 2007TJ won't start /run
I have a 2000 TJ. It currently won't start most of the time and when it did start it was only after sitting over night and then would start and run for about 5-15 minutes depending on the temperature outside. I replaced the following with on luck... the crankshaft position sensor, the camshaft position sensor, the coil pack. when none of these work I had it towed to a garage who after trying some other test, replaced the PCM. But still does want to start/run. The jeep is set up with CA emissions. Anyone have any suggestions? Thanks in advance Pete Clean the throttle position sensor connector with electrical cleaner. >I have a 2000 TJ. It currently won't start most of the time and when it did >start it was only after sitting over night and then would start and run [quoted text clipped - 9 lines] > > Pete Does that usually get afeected by heat? > Clean the throttle position sensor connector with electrical cleaner. > [quoted text clipped - 11 lines] >> >> Pete scanner shows problem with camposition sensor. I forgot to put this in original posting >I have a 2000 TJ. It currently won't start most of the time and when it did >start it was only after sitting over night and then would start and run [quoted text clipped - 9 lines] > > Pete > scanner shows problem with camposition sensor. With all the problems and replaced bits you are mentioning, I would suspect a faulty harness or ground splice issue. That's going to take a multimeter, disconnecting the harness, and about 4 hours of your time to diagnose. These days most shops only hook up the scanner. Problem is the scanner can't detect wiring faults that well.  Signature-- DougW -- 93 ZJ 4.0 http://revbeergoggles.com HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors Banks Header - and BEER, in the fridge! Can you describe more about it not starting? Do you turn the key, hear it crank, but the engine doesn't turn? etc... I had a problem with my 2000 TJ where that would happen. It was like there was a fuel pump problem. It was under warranty at the time. The dealer had NO IDEA what was wrong. They just started replacing everything. Fuel tank (fuel pump is part of tank), PCM, etc.. They would fix it, it wouldn't start again and I would bring it back. I think this went of for about 2 - 3 weeks where I didn't have the car. Eventually, I just worked. I suspect replacing the PCM solved the issue. Overall, I think a grounding issue or short was causing the failure. Nick > I have a 2000 TJ. It currently won't start most of the time and when it did > start it was only after sitting over night and then would start and run for [quoted text clipped - 9 lines] > > Pete Turn the key, engine turns but doesn't start.the engine would start first thing in the morning and run for 5-15 minute. the garage hooked up three test lights to the ignition coil control wires before starting it one morning. the lights came on when the engine started. the after while the some of the lights would start to flicker or just go out. That is how they made the call that the PCM was the problem. But after replacing that the engine still won't start. > Can you describe more about it not starting? Do you turn the key, > hear it crank, but the engine doesn't turn? etc... [quoted text clipped - 28 lines] >> >> Pete Your description is almost exactly what I experienced. From what I recall, the fuel pump (part of tank) melted. They replaced that and the PCM. They also indicated they had a diagnostics tech looking for shorts. Are there any TSBs on this? I recall hearing other people experienced this problem a few years ago. Also note, I think many of these problem occured after putting down my front windshield. After that, I experienced a leak between the front windshield and lower gasket. This may have caused some shorting and been a contributing factor into the problem. Nick > Turn the key, engine turns but doesn't start.the engine would start first > thing in the morning and run for 5-15 minute. the garage hooked up three [quoted text clipped - 36 lines] > > >> Pete |
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