Fuel cutoff- what triggers it?

[isham-research.freeserve.co.uk at pop.pol.net.uk]

> So I don't think it explains the symptoms.  It sounds like a
> simple overboost fuel cutoff.  Which usually occurs for one of two
> reasons.  Torn diaphragm (common IME) or bad hose to the bottom
> of the wastegate (less common IME).  A stuck wastegate is also
> a remote possibility.

Our experiences differ.  I find few wastegate diaphragm problems.

> The dash boost gauge cannot be trusted at the best of times
> and should be ignored as a diagnostic tool.  You have
> to plumb in a mechanical gauge to find out what is going on.

He.  There is at least one extant Audi publication that refers bluntly
to the dashboard guage as a 'Kundenattrappe' (customer contraption)
and says it has no useful diagnostic function.

--
 Phil Payne
 UK Audi quattro Owners Club
 Phone +44 7785 302803   Fax: +44 7785 309674