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Old 02-06-2007, 10:23 PM
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Join Date: Feb 2006
Location: Louisiana266 Maloy Rd winnfield71483
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Cool High Idle

Quote:
Originally Posted by Bill Mobley View Post
I have a 1987 560SL. When I first start the car the engine RPM goes to 1,000. After a brief time the RPM drops to 500. I drive around the neighbor and stop several times. The RPM drops to 500 each time I stop. However, after the car temperture reaches normal operating range the RPM goes to 1,ooo and stays there. I recently replaced the cold start valve and some vacumn tips / lines. What could cause the RPM to go to 1000 after the car warms up? Thanks for any suggestions.
Look into the Idle control valve and where it gets its signal.JNT
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