So, something finally went out.

I had to change my battery (died on me), replaced it with a new one, started, the Jeep was running ok. Turned it off, started again, and that's it. Won't start again. Turns and sounds like its ALMOST there.

I was able to determine I have fuel and spark.

I had a head on with a tree, minor damage before that, that's fixed.

No codes, no check engine light.

A crank sensor malfunction would not give spark from what I read. What else could it be?

 

Bad coil.

Flash

 

There is spark. Can a coil be bad and give spark?

 

A coil can give a weak or intermediate spark and still be bad.

 

Ok, got it started. Had to shift to N, apply break and half-throttle. It will die if I don't keep the revs up with the throttle. After 2 minutes it idles ok.

What died?

 

The #1 cause of "stalling" unless you tip in the throttle is a marginal voltage situation.

I know you replaced the battery, but was it completely charged before you installed it? I'd also consider "load testing" it. It is somewhat rare, but you can get a DOA battery direct from the parts store. I've had it happen to me once.

Gotta verify electrical before looking elsewhere.

 

You just needed to reset idle values in pcm. Thats y it started to idle fine after a bit.should be fine now

 

Thanks for your answers. It stalls at idle RPMs from time to time now.

1. Battery is ok, checked before installing.
2. Idle values - yes, that was my first thought, but I think it should stop stalling if this is the case.

I guess I got to do the regular IAC, TPS, O2 sensor tests. I will post what I find for future readers.