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Buzz in Boost on 1987 900t >
Posted by ChipJ (more from ChipJ) on Tue, 17 Sep 2002 14:02:01
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For the last 30k miles my car has made a buzzing sound when the boost needle passes into the yellow. This is my first turbo - I thought they all made that noise. I get full boost to the end of the yellow zone. A friend rode in my car last weekend who has owned many SAAB turbos and he was very surprised to hear that sound. He thought it might be some one of the modulation valves clicking on and off very rapidly. I thought it might be the turbo blades nicking the housing but he did not think that would last 30,000 miles before breaking.
Any theories? Car has 135,000 miles on it now.
posted by 64.94.1...
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