Re: Ur quattro questions

[quk@isham-research.demon.co.uk (Phil Payne)]

In message <008301be6e5e$33050220$4556883e@default> "Jim Haseltine" writes:

> OK then Phil, what should be there? Looking at the under-bonnet diagram it
> looks as though the 3/8 fitting on the back of the inlet manifold (the part
> with the two small take-offs for the ECU and the diffs) is supposed to be
> plugged. Right? If so, what should it be plugged with and should there be a
> pipe on the warm-up regulator, if so where should it go or should this be
> plugged too?

> The only other running Ur-q in my area is a wr so I haven't got anything to
> compare mine to.

True.  You'll have to be careful comparing with other MBs, too.

The end of that pipe should always be plugged.  There is no vacuum
connection to the warm-up regulator on the MB - what was a mechanical
feature on the WR is in HD6303 microprocessor code on the MB.

Audi changed the plumbing to relocate the feed to the wastegate
solenoid valve from unthrottled to throttled air about halfway through
the MB's production run.  This subtelty doesn't show up on the
underbonnet diagram.  The plug is probably 049 133 335.

--
 Phil Payne
 Phone: 0385 302803   Fax: 01536 723021
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