Black Smoke?

[Jörgen Karlsson]

I have found that many of the 1.8t cars do this, I don't know what causes
it. I have only seen one Audi that does it but several Beetles and Passats.

Is it only a short puff of smoke when he step on it or does it run rich all
the time when under boost?

Jörgen


> A friend of mine is driving a 1997 1.8T A4.  He has about 73K on it and
> has had some trouble with black smoke coming out of the exhaust when the
> turbo kicks in.  Any ideas as to what the cause is or what to do about it?