I have a 97' Grand Cherokee Limited, straight 6, 4.0 with 164,000 miles.

Problem: The car won't hold idle and stops during driving. Sometimes it will appear to be OK at startup but still goes into this routine. For a while, during Winter (cold and snow here), it seemed to almost NOT have this issue, but that was short-lived.

I've taken the car to three mechanics over the course of a year with no solve.

Computer: The computer shows "ignition coil."

What's been done: Replaced Cam Shaft Sensor, Ignition coil and starter.

Also replaced muffler- supposedly related to this issue (huh?) and exhaust leak.

Has anyone run into this issue? Any idea as to what it is? What to do?

Thank you

 

Has anyone checked the Throttle Position Sensor?
And Welcome to CF!
Dan

 

I don't think so Dan. In another forum they suggest servicing the IAC, ASD, then on to fule pump and ECM.

Thanks for the help and thanks for the welcome.

Adrian

 

Hey Adrian, I'm glad to try and help when/if I can, and you're welcome.
Dan

 

Hey Dan- how do I check the throttle position sensor and what does it do? Does it outrank the IAC in probably cause?

Thanks,
Adrian

 

I'll send you a Private Message.

 

Adrian check your Messages.
Dan

 

Got the PM and sent you one back: Dan, you da man ole Blue!

Thank you!

Adrian

 

Glad to be of help when/if I can Adrian.
Dan

 

Sounds like the IAC motor is failing.

 

I agree i had the same problem on my 95 and my 00 GC and i replaced the Throtle positioning sensor and if fixed the problem

And i dont think that you can check to if their working all you can do is replace them but the good thing is their not too expensive


hope this helps