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Black smoke arrives

In message <Pine.LNX.3.95.980216093827.10539A-100000@xanadu.local.net> Preston Brown writes:

> After she got to work this morning, my fiancee called me at home to report
> that our 86 5KCST had been blowing "a lot of black smoke" out of it's
> tailpipe on the highway.  She said it wasn't constant; it came in bursts.
> She also said it wasn't a problem at lower speeds.

> The poor audi has been quite expensive to maintain over the last 2 years,
> but until this point it has had no engine trouble.  The odometer is at
> 130K.  Does anyone have ideas about what the problem might be (I assume it
> involves burning oil) and if so, is it going to be feasible to fix from an
> economic point of view, or should I start looking for another car?

BLACK smoke?  Usually extreme over-enrichment.  Might simply be that the 
mixture screw has been turned by someone a bit over-enthusiastically.

 Phil Payne
 Committee Member, UK Audi [ur-]quattro Owners Club