jgln
Well-Known Member
The IAC (idle air control) motor on the throttle body has been a problem on all Dodge and Jeep trucks, it gets coked up and sticks, I don't think that is your problem because it is only active at Idle and you had a problem while driving. Again what engine is it? If it's a 4.7 it could just be a bad coil on cyl #2 since it has a coil per cylinder, if it's a 3.9, 5.2 or a 5.9 it is most likely the crank sensor.
Was the check engine light on at all? You did say that someone at some point "reset" the computer so there must have been a code of some sort in there even if it was a pending code (does not turn the light on till the next fault).
When you were driving it and it was running like crap was it all the time or did it smooth out somewhat at a idle? If the dealer took the heads off I would think they were looking for a mechanical fault like a burnt valve, bad guide or a ring issue but as I said before that is not a problem that will fix itself and run good sometimes and not others it will run like crap all the time. And yes I agree with you if they are taking the heads off they better give you a concrete answer as to what is wrong and why you need a rebuild.
When it would run bad it was bad. I mean when it was driving bad it was idling bad even in park. But then a few hours later running as smooth as could be. Acts up in the early morning hours then fine in the afternoon once it warms up..or so it would appear.