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Re: UrQ Hot Start - Help

In message <s7832798.057@hlthsrc.com> "Eric Renneisen" writes:
> Phil Payne wrote:
> > a) Seriously shagged idle stabiliser valve.  Take it off the
> >  car - if you can blow through it, bin it.
> This test certainly applies to this particular situation, but
> I don't think that this test is valid for all ISVs out there.
> The 7A (NA 20V) engine came with two versions. Your test will
> work for the Hitatchi unit on the early cars, though you needn't
> pitch it--see http://20v.org/engprob.htm#isv
> The later cars have a Bosch ISV that will pass a slight amount
> of air at rest. A perfectly good one might fail your test. (I'm
> not sure if the default opening is enough to notice when blowing
> through it.)

Early ur-quattros have a Hitachi unit.  Later ones use VDO.  Any leaks
in either are fatal.

 Phil Payne
 UK Audi quattro Owners Club
 Phone: 0385 302803   Fax: 0870 0883933