Check engine light in 1988 Audi 90Q

[Richard Beels]

Check your exhaust system.  For me, the flange at the front of the cat was 
loose.

At 22:55 10/10/2001,  Radek was inspired to say:
>Hello!
>The check engine light comes up a few minutes after the engine is started.
>It seems to be flickering a bit.  The engine seems a little rough, there is
>some vibration at idle speed and the speed seems to vary a bit.  What should
>I check first?  I just got the car recently, replaced spark plugs, wires,
>cap and rotor, as well as installing a new air filter.  Any suggestions will
>be highly appreciated.  Thanks.
>Radek
>1988 Audi 90 Quattro


Cheers!