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Old 06-10-2008, 09:34 PM   #1
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high pitched squeal after warm up

my 97 2.5 liter manual wrangler has had an annoying problem the last week or so. after it warms up, it starts squealing at idle (almost like a loose belt, or a tea kettle) but it's not the belt. it makes this sound very loudly as i idle down the road or between shifts when i let up on the gas pedal but stops when i give it gas again. i suspect it's some sort of vacuum leak. i thought it was the idle air control valve which made sense to me in my mind, so i replaced that and it's still doing it. i cleaned the throttle body and inside the iac as well, and i replaced the tps a couple of years ago, although i don't think that would have anything to do with it. my performance is not affected. it just sounds like i'm driving a giant blue tea kettle. i tried the search and found 2 other similar posts but no one replied with any possibilities. hope somebody can help me!!!
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Old 06-11-2008, 06:04 AM   #2
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does sound like a vacuum/intake leak. Have you checked all around your intake for a leak ??

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Old 06-11-2008, 03:20 PM   #3
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Originally Posted by brownie65 View Post
does sound like a vacuum/intake leak. Have you checked all around your intake for a leak ??
it does it with the airbox all the way off, the same way...that's why i thought it was the iac valve. i tightened the throttle body down too, just in case it was sucking air in through the side or something....
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Old 06-11-2008, 03:45 PM   #4
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Spray the area with some carb cleaner......if I remember correctly. If you hit a leak the idle will spike for a second and youll know where the vac leak is.
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