Jeep Grand Cherokee PCM
I went out and started my Jeep up without problem. I then drove it about 30 miles and shut if off for about 3 hrs. Again, I went out and started it up without problem but the Abs, check engine and airbag lights were on. When i tried to drive it, I couldn't get over 20 mph with it floored and the gauges began to flicker. Pulled over, turned it off, started up and the same thing happened. Left it for the night, started it up again and it spit and sputtered terrible while the guages flashed on and off. It finally deseled out and stalled with a puff of smoke through the air-breather. Checked fuel pressure and fuel pump, both are fine. There are also no error codes. It is at the dealer now and they have ruled out mechanical failure; so now it must be electrical right? Could it be a sensor? or the PCM? Any ideas or help would be appreciated.
Does anybody have an answer?
any ideas would be appreciated
As an aside to that problem i have had most of the problems posted about lack/loss of power and still trying to fix it, replacing the crankshaft sensor is my next option.
Dealer says the PCM is defective but am not so sure. it seems to be worse when it gets hot and also when the dealer "tested" it by giving it a good hard whack with the palm of his hand with the car running it stopped.
I believe the PCM will be rated for the extreme temperatures under the hood so I am inclined to think it is a bad contact. Would appreciate to have some info on what you found before I spend over $1,000 on a new PCM which might not cure the issues.
The only other items I thought bout were the crankshaft position sensors and the camshaft position sensors.
Any help you can give would be great. it does not suit being a yard ornament, it is meant to run.