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Author Topic: 01 XJ idling rough, dying  (Read 2828 times)

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Offline EEP

  • UberWheeler
  • Posts: 328
01 XJ idling rough, dying
« 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.
« Last Edit: May 05, 2015, 07:50:39 PM by EEP »
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01 XJ, RE 3.5" lift, Smittybilt XRC front & rear bumper, X2O 8,000 lb winch, 33" MT/R's
, ARB snorkel, lockers and a bunch of other stuff
06 TJ, 2" lift, 31" Goodyear Territory's.
14 JKU, wife's urban 4X4.

Offline Dingleberry

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  • Posts: 450
Re: 01 XJ idling rough, dying
« Reply #1 on: May 06, 2015, 09:20:50 AM »
I wouldn't test those until you've first verified its not the CPS.
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Offline EEP

  • UberWheeler
  • Posts: 328
Re: 01 XJ idling rough, dying
« Reply #2 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.
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01 XJ, RE 3.5" lift, Smittybilt XRC front & rear bumper, X2O 8,000 lb winch, 33" MT/R's
, ARB snorkel, lockers and a bunch of other stuff
06 TJ, 2" lift, 31" Goodyear Territory's.
14 JKU, wife's urban 4X4.

Offline TL-Iguana

  • Talks waaay too much!
  • Posts: 1117
  • XJ - The Official TJ Rescue Vehicle
Re: 01 XJ idling rough, dying
« Reply #3 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.
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I did a Google search for "hot trannies" but nothing came up about oil coolers  :o

Worrying too much about mpg with a Jeep is similar to worrying about your sister's virginity. An ok thing to be concerned about but...

'01 XJ on 35s, '11 Jk DD

Offline EEP

  • UberWheeler
  • Posts: 328
Re: 01 XJ idling rough, dying
« Reply #4 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.
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01 XJ, RE 3.5" lift, Smittybilt XRC front & rear bumper, X2O 8,000 lb winch, 33" MT/R's
, ARB snorkel, lockers and a bunch of other stuff
06 TJ, 2" lift, 31" Goodyear Territory's.
14 JKU, wife's urban 4X4.

Offline Duncan71

  • Budget Lift
  • Posts: 276
Re: 01 XJ idling rough, dying
« Reply #5 on: May 10, 2015, 05:21:12 PM »
Think you might still have a problem.... sounded too lopy when you drove away. 
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Offline EEP

  • UberWheeler
  • Posts: 328
Re: 01 XJ idling rough, dying
« Reply #6 on: May 10, 2015, 05:29:26 PM »
Ran good out wheeling yesterday.
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01 XJ, RE 3.5" lift, Smittybilt XRC front & rear bumper, X2O 8,000 lb winch, 33" MT/R's
, ARB snorkel, lockers and a bunch of other stuff
06 TJ, 2" lift, 31" Goodyear Territory's.
14 JKU, wife's urban 4X4.

Offline Duncan71

  • Budget Lift
  • Posts: 276
Re: 01 XJ idling rough, dying
« Reply #7 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.
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Offline EEP

  • UberWheeler
  • Posts: 328
Re: 01 XJ idling rough, dying
« Reply #8 on: May 12, 2015, 11:49:14 AM »
I will check it out, thanks
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01 XJ, RE 3.5" lift, Smittybilt XRC front & rear bumper, X2O 8,000 lb winch, 33" MT/R's
, ARB snorkel, lockers and a bunch of other stuff
06 TJ, 2" lift, 31" Goodyear Territory's.
14 JKU, wife's urban 4X4.
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