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mysterious 5kcstq problem

> Car starts fine, idles fine, and runs out fine until you come into boost.
> On boost the car begins to buck and breakup.  The behaviour is temperature
> sensitive, in that, if ambient is below 40 deg F, no breakup until say 1.2
> bar.  If ambient is above say 65 deg, occurs around 1.0 bar, and as car
> heats up to full operating temperature the threshold drops to as low as 0.7
> bar.

The relatively thick braided hose from the back of the inlet manifold
to the main wastegate attachment has become porous with age.  Feel
underneath it, especially at the wastegate end.

 Phil Payne
 UK Audi quattro Owners Club
 Phone +44 7785 302803  Fax +44 870 0883933