1979 Porsche 911 Idle problem

1979 PORSCHE 911
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SHOOTER5454
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Engine Performance problem
1979 Porsche 911 6 cyl Two Wheel Drive Manual 140.00 miles

I have 911 sc It starts an runs perfect, but after it warms up the idle wont go below 2000 rpm, its still fuel injected, vacum line are good and intact
Sep 7, 2010 at 4:42 AM
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CWPORSCHE
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Check the aux air valve,it should be closed when engine is warmed up.Its controlled electrically and its designed to be a controlled air leak around the throttle plate. As the engine warms up it closes shut lowering the idle,or it could be a sticking throttle.
Sep 9, 2010 at 7:24 AM
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