2002 Jeep Cherokee Vehicle idles up real high

WREGGIE91

MEMBER
2002 JEEP CHEROKEE

Engine Mechanical problem
2002 Jeep Cherokee 6 cyl Two Wheel Drive Automatic

My wife 2002 jeep cherokee has been a great car, but recently the car has started to idle up real high everytime you start it. The cars airconditioner fan switches from the de frost vents to floor vents to regular vents not in that order but it does this on its on . This all started around the same time I'm assuming its because of some air flow sensor. I would also like to know if this something I coulud fix myself.

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LEGITIMATE007

MECHANIC
5,121 POSTS

I think the high idle is because of a vacuum leak, and the vacuum leak is at the mixing doors, because I believe vacuum helps to control the movement of the vents thus causing the switching of the vents when you start it

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Friday, March 19th, 2010 AT 6:21 PM

LEGITIMATE007

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Is there a check engine light on?

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Friday, March 19th, 2010 AT 6:22 PM

WREGGIE91

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Sorry it took so long to reply, I had to update my account. The check engine light is on after getting it checked to see why it was on.I was told by the two technician that it was on because the gas cap was not tightened. After tightening the gas cap til it clicked about fifty times i'm still at square one.

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Thursday, April 15th, 2010 AT 2:06 PM

LEGITIMATE007

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The gas cap could be bad though. May need replacement

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Friday, April 16th, 2010 AT 10:41 AM

WREGGIE91

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Well, it turns out that the gas cap was good. If I turn the vehicle on and turn the A/C on and off repeatedly then it changes the way the vehicle idles.I dont know if it suppose to do that or not it seems as if the dealership is clueless.