Whining noise under boost

Ingo D. Rautenberg ingo at waratap.com
Wed Feb 13 18:12:55 EST 2002

Congratulations on your new aquisition!   I thought they didn't have the
200q20v (type 44 chassis) in Europe. Or is that our UrS4 (C4 chassis)?

Also check turbo>intercooler hose and (more likely ruptured)
intercooler>intake manifold (Michelin man) hose.  But in my case the lower
turbo-IC hose was split.

'91 200q20v with a few mods...+ '83 Urquattro

----- Original Message -----
From: "Eyvind Spangen" <eyvind.spangen at c2i.net>
To: <200q20v at audifans.com>
Sent: Wednesday, February 13, 2002 5:38 PM
Subject: Whining noise under boost

> My newly-acquired '90 200TQ20v (Europe) have a strange noise under
> boost. It sounds just like an air leak, but the pitch it much lower
> than the usual turbo whine. Could it be the bypass valve leaking? I
> can hear the valve working (a "dumping" sound) when I go off the gas
> pedal under boost. The dash gauge only reads 1.4, so I guess I have to
> check out a few things..
> --
> Regards,
> ES
> _______________________________________________
> 200q20v mailing list
> 200q20v at audifans.com
> http://www.audifans.com/mailman/listinfo/200q20v

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