High pitch squeal when lightly press throttle
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Joined: Jul 2001
Posts: 1,828
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From: San Jose, CA
Car: 2002 Z28
Engine: LS1
Transmission: 4L60E
Axle/Gears: 3.23
i was getting that same exact squeal a few months ago then all the sudden it just went away, but every once in awhile i get a very low squeal. Not sure exactly what causes it and i would like to know what other people think.
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Joined: Mar 2001
Posts: 6,577
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From: Portland, OR www.cascadecrew.org
Car: 1990 Camaro RS
Engine: Juiced 5.0 TBI - 300rwhp
Transmission: T5
Axle/Gears: 3.42 Eaton Posi, 10 Bolt
i would guess it is the IAC, i didn't download the video, but i would give the IAC a good cleaning with some carb cleaner, and see what that does.
Joined: Feb 2001
Posts: 13,756
Likes: 560
From: Cincinnati, OH
Car: '90 RS
Engine: 377 LSX
Transmission: Magnum T56
I would clean the whole TBI unit especailly underneith. There is a maze underthere of tiny passages and nooks and stuff and air that gets impeded could squeel. It may be a good time to do the unltimate mods along with a good scrub down.
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Joined: Feb 2002
Posts: 2,663
Likes: 9
From: Buckhannon, WV
Car: 84' Monte
Engine: 350
Transmission: 700-r4
Axle/Gears: ferd 9" posi 3.50 gears
I had the same problem and it was a major vacum leak. If it is a extremely loud high pitched squeel it is probably a vacume leak. If it is a lower pitched almost wine it could be the iac. My vacume leak was around the base of the tb. The gasket was acting like a reed in a wistle and making all kinds of noise when my throttle blades were close the leak.
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