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Increasing idle

Old Jan 18, 2015 | 08:36 AM
  #1  
Low money and high dreams's Avatar
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From: Michigan
Year: 1989
Model: Cherokee
Engine: 4.0 Inline Six
Default Increasing idle

OK so when I go start my Jeep (89 cherokee) it idles around 800 but after about 10 minutes it will slowly increase to around 2 grand before I shut it off. I've never seen a problem like this so I don't even know where to start.
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Old Jan 18, 2015 | 09:30 AM
  #2  
SeriousOffroad's Avatar
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Joined: Apr 2008
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Model: Cherokee
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A thorough throttle body cleaning paying particular attention to the Idle Air Control (IAC) should be Job #1.
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Old Jan 18, 2015 | 10:02 AM
  #3  
Jeepcrazy5722's Avatar
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From: Spokane
Year: 1988
Model: Cherokee
Engine: 4.0
Default

I would also do the tip's in this link https://www.cherokeeforum.com/f51/cr...x-tips-153657/ . I also had issues with a high idle and cruiser54's renix tips help me out. My old renix runs great now.
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