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Strange Boost leak Howling tone
Posted by TSR [Email] (more from TSR) on Tue, 7 Mar 2006 10:44:41
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Every since I built my motor for my 89' SPG I have been experiencing a noise under high boost. First I would think that this means I am loosing boost somewhere. However all the normal places I have checked. No vaccum leaks, all new gromets. The turbo ducting connectors all look good. I have a new hi po by pass valve. I do not recall the engine making this noise prior to the rebuild. Could the intercooler be leaking? How about the brake booster? seems like if there was a problem here you might only see it under boost. There is a check valve on it and I have check this also but seems ok? How common does the o ring seal on the throttle body cause this. I did not replace that when I transfered it from the 2.0 manifold? Any other ideas???
My car has 2.1 head 8.5 compression pistons, 30LB injectors 3.0 bar fPR,
posted by 12.186.6...
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