Calgary Jeep Association

4x4 Related Groups => Tech Talk => Topic started by: EEP on May 05, 2015, 07:44:42 PM

Title: 01 XJ idling rough, dying
Post by: EEP on May 05, 2015, 07:44:42 PM

The eep (4.0 l) is idling rough, even dying at idle. Smooths out with a little throttle. No vacuum leaks. Could it be a bad coil, bad injector?
Thanks in advance.

Title: Re: 01 XJ idling rough, dying
Post by: Dingleberry on May 06, 2015, 09:20:50 AM

I wouldn't test those until you've first verified its not the CPS.

Title: Re: 01 XJ idling rough, dying
Post by: EEP on May 06, 2015, 10:07:04 AM

Quote from: Dingleberry on May 06, 2015, 09:20:50 AM

I wouldn't test those until you've first verified its not the CPS.

Thanks, I ordered a new cps, will put it in this afternoon.

Title: Re: 01 XJ idling rough, dying
Post by: TL-Iguana on May 06, 2015, 11:57:54 AM

My 01 had this issue as well. Turned out my idle air control motor had to be replaced. You can easily take that out and clean it, and also wouldnt hurt to check the other sensors in the intake to ensure they are clean and working properly.

Title: Re: 01 XJ idling rough, dying
Post by: EEP on May 07, 2015, 03:21:12 PM

Quote from: TL-Iguana on May 06, 2015, 11:57:54 AM

My 01 had this issue as well. Turned out my idle air control motor had to be replaced. You can easily take that out and clean it, and also wouldnt hurt to check the other sensors in the intake to ensure they are clean and working properly.

Pulled IAC and cleaned it. Ran little better. Replaced it, what a difference. Think it had been faulty for a while.
Thanks TL.

Title: Re: 01 XJ idling rough, dying
Post by: Duncan71 on May 10, 2015, 05:21:12 PM

Think you might still have a problem.... sounded too lopy when you drove away. 

Title: Re: 01 XJ idling rough, dying
Post by: EEP on May 10, 2015, 05:29:26 PM

Ran good out wheeling yesterday.

Title: Re: 01 XJ idling rough, dying
Post by: Duncan71 on May 12, 2015, 10:25:02 AM

Probably will.   But your missing on a cylinder every once and a while.  Feel the exhaust.  Dunno, maybe its better now, but noticed it first thing when you started er up driving away.

Title: Re: 01 XJ idling rough, dying
Post by: EEP on May 12, 2015, 11:49:14 AM

I will check it out, thanks