Question about 1996 Jeep Cherokee Country

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2005 Wrangler 4.0 idle problem when hot. Idle fluncuates, hangs up at 100 to 2200 RPM. Seems to be worse with A.C. ON.

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  • andy665 Oct 24, 2008

    replaced IAC, but still showing same issues. Dies without Gas or Revs to 3K

  • bianchi007 Nov 17, 2008

    I have the same problem. Can anyone help? Does it have something to do with a vacuum leak somewhere?

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  • 23 Answers

Sounds like a vacuum leak to me start it up and get a can of brake cleaner or soap and water can find it also, I use starting fluid. Spray 1 thing at a time non electronics, intake,injectors while doing that look for loose wires. Then pop the hood in the dark and look for sparks could be a plug wire "white or blue" spark. Good luck

Posted on Dec 06, 2008

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Whats oil pressure on 3.1 isuzu


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old post
all do, everyone. but. the devil really is in the details with EFI.
this IAC valve does that,
to speed it up warm up , put in a 195F thermostat.
this assumes 800 RPM is hot.
most of these engines, do this. new. bewlow.

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