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High Idle.. Vacuum leak?

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Old 04-02-2013, 10:53 AM
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Default High Idle.. Vacuum leak?

I have a 99 XJ with 100k on the clock and it normally idles at 600 rpm but recently when i get to work and put it in park it idles at 1200... yesterday i went to start it up and let it warm up and it started at 600 and i was outside the car talking to my coworker then it just revved itself up to 1200... would this a vacuum leak or what?
Any suggestions on what to check would be really helpful
Old 04-02-2013, 11:15 AM
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Clean your IAC first.
Old 04-02-2013, 11:19 AM
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thats what i thought it would be to i cleaned it about 2k miles ago though
Old 04-02-2013, 11:33 AM
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That would have been awesome info to include in your first post, eh?
Old 04-02-2013, 11:35 AM
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i guess yea lol cleaning it doesn't mean that the parts not bad though
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