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1983 Coupe de Ville, high idle and raw gas smell

553 views 3 replies 4 participants last post by  EricVonHa 
#1 ·
1983 Coupe de Ville, HT4100.

It idles at what sounds like 1500-2000RPM. In hot weather, I can smell gasoline both at idle and while driving. No gas on ground. I can't see any kind of gas leak anywhere under the hood, with the engine running or off.

I have no idea if the gas smell and the high idle could be related, but they both happened after taking the car out of winter storage.

I tried doing the idle control motor relearn procedure. I wonder if I did it wrong.
--Engine warm and running
--Hold throttle at very high idle, push the idle control motor all the way in
--Quickly disconnect idle control motor connector
--Release throttle, let engine idle at low speed. Make sure there's a small amount of space between the motor control piston and the throttle.
--With engine running, plug the motor back in.

When I do that, the motor idles normally for about 30 seconds. Then the motor raises it to a high idle again.
 
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