Intermitent idol problems.

Asked by JEEPMAN1978 Mar 18, 2013 at 07:55 PM about the 2001 Jeep Cherokee Sport 4-Door 4WD

Question type: Maintenance & Repair

I just bought a 2001 Jeep Cherokee with the 4.0 straight 6 engine and O/T. And some times when I start it, it will idol really low and some times die. Also when I come to a stop at a light or something, as soon as I stop the idol will drop down so low that my lights will dim because its not spinning my alternator fast enough, and will some times die. But as soon as I give it a little gas it runs just fine. And it only does it about 60% of the time I'm driving it.
Any ideas?

4 Answers
177,545

tenspeed answered 11 years ago

Try replacing the air filter and PVC valve. If that doesn't help, replace the spark plugs.

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DavidH25 answered 11 years ago

Also your EGR. TS is right, just adding to it. If the EGR is clogged or stuck that can possibly cause idle problems

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1,175

Nick answered 11 years ago

there is a part called the idle air control sensor. super easy to fix. there is 2 torx screws holding it on. unplug battery, wait for a little bit, remove screws and iac. then you just spray it down with carb cleaner and reverse steps. go to jeepforum.com and search for iac. you can get more details

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