warm start / no spark

[Phil Payne]

> Non-Audi experience would point me to the coil.

Audi experience would point me to pulling the ECU codes.

> Max ('87 5KTQ) has been down for the better part of two weeks, with
a few
> hours per weekend devoted to trouble shooting, breaking down,
getting a ride
> home, and miraculously starting several hours/a day later..
> What seemed to be a Hall sensor problem did not respond to identical
> distributor replacement.
> I've seen numerous references in the archives to an intermittant
"Hall
> sensor like" condition exacerbated by cold weather.
> More precisely, it starts when cold, no problem, but after coming up
to
> temperature and being shut down for a short time (1/2 hour) spark is
lost
> until the car gets back down to ambient.. 30 degrees (F) or
thereabouts.
> I plan on going through the rest of the tests this weekend, per the
Bently,
> i.e.Timing and RPM sensors, wiring, etc, etc.
> Just wanting to take a poll as to what is the most frequent cause of
the
> intermittant spark loss condition.
> Many thanks in advance,
> Mark Woodland
>
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