Originally Posted by JoeFaz
So what did you think it was making the eratic idle? Mine is all over the place between 200-2000 rpms at any given time. I have had the TPS and several other sensors changed (professionally) and it will be ok for a day or so, then BAM, right back to the very frustrating idle issue. Now, it has actually begun to occasionally idle so low it will kill at a stop if I'm not careful. When it's high, I have to keep serious pressure on the brakes or put it in N just to keep it from lurching forward. I'm at my wits end!
that's a real good question. i wish i could be more help. I've cleaned the throttle body, changed the TPS, and repaired the vacuum lines
If I were you I would put a high end scanner on the jeep that gives a live readout of the sensors outputs. That way you could see in real time which input is causing the fluctuation.