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Poor idle




I note from the list several problems with idle speed
fluctuations/stalling when cold. My experience on my UK Coupe Quattro
may help out some people.
My problem was found by chance as I was looking to find out where all
the water was coming from that filled up the glove box when it rained.
Well the seal around the windscreen had been letting in water for
several years and water had corroded the double relay size control unit
that controls the idle solenoid valve. I took it apart, cleaned and
resoldered the circuit board and cleaned the connector block. This
completely solved all idle issues, so to preserve the unit from future
damage it was covered by a plastic bag. The passenger door will fall
off one day as the pillar was badly corroded but it will still run.
Hope this helps

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