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fredmeister fredmeister is offline
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Join Date: Oct 2002
Location: Baltimore, MD, USA
Posts: 2,163
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high idle when cold

I recently started notciing that my 1979 930 turbo remains on a high idle now that the weather has gotten cold in Michigan.
I start the car and it never seems to come below 1200-1500rpm even when left to idle for over 10 minutes.
-----After driving the car under load for 20 minutes or so the idle will still remain at 1200rpm or more when I stop at a light.
The weather here is now in the 40 degree F range and I never had the problem in the summertime.
----Anyone know what is the cause and what I should check?

The car is completely stock and the summer idle was 900rpm according to the tach.
Old 11-21-2006, 01:19 PM
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