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Re: MB engine overboost.
> > Experiment: What is the "failure" mode of disconnecting [unplugging
> > the wires to] the WGFV -- does the boost run uncontrolled (overboost)=
The =93failure=94mode of unplugging the WGFV is underboost i.e. boost
limited by the WG spring only.
In this case, just unplug the WGFV and drive around for a few months (!!)
and see if the problem recurs. (Alternatively, unplug for a week, plug
for a week, repeat over several months until a "positive correlation"
can be made.)
Horrible, I know. Short of Audi fessing up, or giving you source listings
for the ECU . . .
-RDH