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problem: Idle around 2000 only on warm start

Hello,

I was hoping on getting some advice on a problem I have encountered recently. I have an 83 911 SC Cab...In the cold morning, the car starts fine, idles normally...

After I drive to get coffee, however, at the local Dunkin Donuts ( about 5 minutes from my house), I get in my car, start the car, and the idle stays at 2000 RPMS....

After I drive for 1/2 hr and the temperature goes to normal operating temp., then at the stop light, the idle is normal again...at 900 RPM...

Could I have a faulty Auxiliary Air Valve?

Hopefully someone with a similar problem can give me some advice. Thanks in Advance.

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I think you are right. check the AAR.

How do I check that valve. I located it in the engine bay but now what? Thanks.

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911 sc cab euro