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Idle problem stumps shop

    The 80 went in to have the idle problems diagnosed today and the wrench
is completely dumbfounded.  He wants to replace the idle switch and see what
happens so I ordered and idle switch and throttle body gasket.  He also
wants me to check the throttle cable going to the transmission and the line
from the transmission to the ECU.  He can't figure the potentiometer code
out for the life of him since he didn't know the potentiometer was
adjustable at all.  The wrench was using an Alldata CD which had a bunch of
info and procedures.  Anyone have more ideas on the idle problems?

After hard driving the idle is erratic
Surging at 1,500rpm every time I coast to a stop
High idle


Alexander van Gerbig
'88 Audi 80 -- Koni Yellows, G&M Springs
HÖR Technologies Sport Hydro Cam, K&N Filter
Borbet Type T, Dunlop SP9000 Sport

The Audi 80 Pages------------------

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Katonah, NY 10536