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Re: ventilation problems with 90Q 20V
> The smell only occurs if the automatic climate
> control is heating (and it does not occur all of the time, typically if the
> engine is hot--having been run hard or for awhile). If it is using A/C, it
> doesn't occur... Maybe it is just because the sensation of freon nullifies
> the smell. Additionally, I don't notice it when the climate system is
Ok, so it's coming from the engine compartment. When the heat is on, you
get fresh air from the outside sucked in. With the a/c on (cooling mode)
or off, the flap is closed and you are recirculating inside air.
Odds are that it's a exhaust manifold leak or valve cover gasket. You
could try cleaning your engine (steam or chemical wash or whatever) or
find an Audi expert who can pinpoint the problem.
| Dan |