Here's the problem. When the car is started cold, it idles about 1200 rpm or so. then it will settle down and idle about 500-600 RPM. If you shut the car off and then start it warm, it goes to around 1800-2000 RPM and will not idle down until you drive it. After driving it at highway speeds, when you exit the highway, it will die when you let it come down to idle, but after you start it, it is fine for the rest of the time you are driving it in the city. Danged if I can figure it out. Any ideas?

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83 W123 240D
76 300D, "Lil Yellow Car"
1978 Cessna 172N 180 HP Mod

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