James Wrote:
I replaced coolant temp sensor with new one from vw dealer (i even
checked the
continuity of the old and new sensors: the new one is tiny 100ohms
higher than
the old one) I also sprayed the idle stabilizer valve with carb cleaner.

Have you had your O2 Sensor checked. I recently had trouble with idling
and surging when accelerating. Had the O2 sensor replaced and I am
running just fine now. I had the Bosch type replacement installed which
is expensive $130 or so .  There are less expensive parts (O2
sensors)manufactured.(Whether they work as well I don't know)
Bruce
brucen@bellsouth.net
--
Joyce and Bruce
Ormond by the sea, Fl
Cooler by a mile