Hello everyone, I am hoping to find an answer for an annoying issue. My 00 WJ 4.0, has a problem that I've been chasing which seems like an easy fix.

1. When just starting up first 20 minutes of driving the jeep will have a low idle at times at a red light which sometimes turns into a shake and shutdown.
2. While driving.. "Foot on the gas" there is increased RPMs but no acceleration for a few seconds or unless I let go and then a jerk back into acceleration.

The first symptom will stop happening after driving for a little while, and the second will happen more aggressively in the beginning and then it wont go away, but it's not severe, just once in a while.
I hope anyone can help, at the moment I am going to change the TPS and IAC, I cleaned the throttle body and MAF. I would say two things that may be related I haven't changed on this vehicle is the crankshaft position sensor and the O2 sensors.
Fuel pump is new, new filter.

Thanks,

 

I had same problem with my 98 I changed the crankshaft sensor and it all went away and was good to go again.