Ok I got this 2001 Jeep Grand Cherokee. It started having having the stalling while driving problem. Got a new fuel pump, changed the ignition coil, spark plugs. Still stalled. Turned out it was the crank position sensor. Changed both the cam and crank position sensor. It was fixed!! Runs perfect! Now after 6 weeks the jeep will start idling when I drive it for 25 min. It will idle then eventually turn off. The rpms will move up and down when I'm at a stop. Please help. What could be the problem?

 

I would check your Idle Air Control (IAC) solenoid. It is on the back of your throttle body held in by 2 screws. If it is gummed up it will act up and cause this problem.

 

I think you mean it will "stall" not stop after driving. Anyway. How many miles on it? How random is the stalling? Does it stall exactly after 25 minutes every time or does it vary? My 2000 (4.7) did the stalling thing. Was the PCM. Mine started out doing it intermittently, then got more consistent as time went on until it finally crapped out all together. Did you get any codes?

 

139 hundred miles. It will start idling rough then stall if I drive for more than 25-30 mins. To see if it starts acting up I'll get home from work(which usually takes me 20 min to get home), I'll wait in the drive way. Around 25-30 mins it will the rpms will start going crazy than eventually turn off. In a hour or so it will be fine. I can drive again.

Here's the codes.
P0353
P0351
P0161
P0352
P1391

All those codes point to stuff I already changed.
New ignition cool, spark plugs,cam and crank shaft. The only thing I haven't changed is the O2 sensor. My mechanic said I might need to flash my pcm.

 

Engine size? Your profile doesn't say. "Flashing" is a fancy word for reprogramming. Can only be done by a dealer. At this point, they'ed be best suited to figure this out. The flashing should cost about 1 hours labor.