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MB engine overboost.
In message <199712302159.QAA04644@urq.East.Sun.COM> Robert Houk - SMCC Bos Desktop Hardware writes:
> Some "real numbers" would be good to see (actual manifold pressure
> readings; wastegate control duty cycle values; O2-sensor readings;
> etc., and so forth)...
All of these vehicles are stock (or, in John Robinson's case, it was when he
had the problem). The problem is that it is extremely intermittent. John saw
the problem only twice - it's only once happened (to our knowledge) to a
professional mechanic. On my car, I used to see it during the warm-up phase
once or twice a week - but it never happened with the instruments attached.
Committee Member, UK Audi [ur-]quattro Owners Club