Newbie question regarding fuel pump noise (85Q Coupe Quattro)

[Piirainen Antti]

I might sound paranoid, but since I have little experience with
fuel-injected engines and none with Audis, I'd like to get a confirmation on
this.

When listening to my recently acquired typ85 Coupe Quattro while it's
idling, there's a distinctive high-pitched sound, which can be clearly heard
near the rear left hand wheel. Some sort of a "whizzzzzz" - well, add some
white noise to a sawtooth wave - with a constant rate, unchanged when the
engine revs occasionally fluctuate. The exhaust system doesn't have leaks.
This would suggest the noise is emitted by the fuel pump (out-of-tank,
right?). Is this supposed to be normal, or should I spare some money for a
new unit? I have no idea if and when the pump's been replaced.

It's below zero here by the way (and the roads are in perfect condition for
some Quattroin').

Antti Piirainen
Software Engineer, Camline Corporation
tel..: +358-5-621 4200             direct: +358-5-621 4229
fax..: +358-5-621 4242             gsm...: +358-40-522 2772
email: antti.piirainen at camline.fi  www...: http://www.camline.fi/