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Re: Vacuum leak update
Posted by Geoff [Email] (more from Geoff) on Sat, 9 Aug 2003 16:22:08
In Reply to: Re: Vacuum leak update/BPV source query, Dean, Sat, 9 Aug 2003 14:03:18
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No BPV leaks when testing by mouth. I could see/feel something moving up and down through the return outlet when applying vacuum to the vacuum fitting. No CEL in 100+/- miles since sound appeared, engine idles and runs normally, except boost peaks lower than usual (at orange/red line rather than half-way into the red) and acceleration at WOT doesn't match the usual Speedparts-induced kick in the butt (but its also about 100F outside today). I continue to hear a distinct high-pitched whooshing when on boost, loudness directly proportional to position of boost gauge needle. Ordered a Forge BPV anyway, but not confident that is the source of the sound.
If it were a manifold gasket leak, wouldn't normal idling/running be erratic and possible CEL? What other sources of leak on boost but no apparent issues or sounds otherwise.
/Geoff
'96 900SET 96.5k mi
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