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Weird weird weird idle!!!!!!

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Old Jun 14, 2012 | 09:23 PM
  #16  
cruiser54's Avatar
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From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
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Originally Posted by Gorilla369
Ya I did the tests after I did the grounds. The only thing I haven't done is install the 4awg wire.
Perfect. C101 done?
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Old Jun 15, 2012 | 11:08 AM
  #17  
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From: Clackamas, OR
Year: 1988
Model: Cherokee
Engine: 4.0
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Yup, pretty gross ish in that thing. I swear the previous owner didn't do any maintenance on this thing. It was kind of a rescue.
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Old Jun 15, 2012 | 11:18 AM
  #18  
Elexwiz's Avatar
Wheel, break, fix, repeat
 
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From: Chesapeake, VA
Year: 1987
Model: Cherokee
Engine: AMC I6 4.0
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Food for thought. I have an 87. It had the same idle issues when I first got it. I did the same ground cleaning and vacuum checks listed here but nothing worked. I started poking around the fuel rail and I pulled back the heat covers on my injectors. I found that TWO of the injectors each had a broken wire. I was running a 4 cylinder. I'm actually impressed at how "well" this engine runs on 4 cylinders. It's not smooth, but it still runs. When it get up to temp it actually keeps itself breathing, mostly...
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Old Jun 15, 2012 | 12:05 PM
  #19  
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From: Clackamas, OR
Year: 1988
Model: Cherokee
Engine: 4.0
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Alright thanks, I'll check that out.
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Old Jun 18, 2012 | 04:46 PM
  #20  
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From: Clackamas, OR
Year: 1988
Model: Cherokee
Engine: 4.0
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O2 sensor is done and it is running alot better. The idle issue is still there. Started it this morning and the idle was at 700, then started it when I was leaving the store and it idled up at 2000. I canceled the CPS order from Crown and went to Jeep and ordered the actual Mopar one today. The injectors were all good so I will let you guys know what happens when I replace the CPS tomorrow.
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