Finding boost leak?

Michael Gough mdg3369 at
Wed Sep 19 15:34:00 EDT 2001

Hey guys,
I need some help. I have a large leak in the intake system, but only in
boost. The car runs fine in vacuum, in boost I can hear a large leak. It
isn't the turbo whistle that is supposed to be there. Then when I shift
there is a big woosh like a blow off valve would produce. The thing that
baffles me, I pressurized the intake plumbing, and I could not find a leak
even with 10psi! Anybody have any ideas?

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