XJ - High idle at start.

TapouT

Well-Known Member
Joined
Oct 5, 2008
Location
Hickory nc
I bought an '89 Cherokee Pioneer with a 4.0 yesterday and I went out to start it today and it started up fine and idled just fine and I pulled it around the house and shut it off so I could wash it. About 30-45 minutes later I went to start it and it was idling super high, so high that when I put it in drive it started spinning the tires. I put it in park and shut it off. Then when I cranked it again a few seconds later it only idled high for about 2-4 seconds then it idled back down and started idling normally. Could the IAC be the problem? Should I just take it off and clean it with brake cleaner? Anybody know what size torx bit it takes? Thanks for the help!
 
i had a problem close to what your sounds like and i just took my positive battery cable off for 5mintues and let the computer reset itself and every thing went back to normal after that
 
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