Sounds like a vacuum hose - Saab 9000 Bulletin Board - Saabnet.com
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Sounds like a vacuum hose
Posted by QuasiMotor (more from QuasiMotor) on Tue, 20 Mar 2001 23:48:50
In Reply to: QuasiMotor, Buz, Tue, 20 Mar 2001 13:17:53
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The whistling sound is a dead give away for a vacuum leak. Coupled with the vibration at idle, it makes even more sense. Go after the source of the whistling sound. Try crimping each vacuum line to see if you can cure the problem. If it's a turbo, check the bypass valve. See link below. Disconnect the bypass valve vacuumline and suck on it. If no resistance, then either the valve is bad or the hose is split.
Vacuum lines
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