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Re: <Audi> Help! Intake leak

Steve Manning writes:
> My 1990 200tqw has suddenly developed what seems to be a huge intake leak
> under boost.  At boost over a couple psi (around 1.1 bar) it starts making
> the loud metallic hissing sound

Check the idle adjustment screw on the throttle body.  Did it fall out?

96 A4 2.8 quattro
84 5000S 2.1 turbo
80 4000 2.0
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