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Old 05-05-2002, 10:49 AM
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Cruise control surging

I have a 1986 560 SEL with a cruise control that works fine with the exception of "surging" when the car is going down hill. When it starts I disengage the CC, then activate it when the terrain levels out and everything is back to normal. I have checked the archives but can't find anything relating to this problem. Any ideas?
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Old 05-06-2002, 09:33 PM
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Join Date: Jun 2000
Location: Near Williamsburg, Virginia
Posts: 359
I'd say it is trying to tell you that you are going to SLOW. 560's like triple digit speeds!
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Old 05-06-2002, 09:35 PM
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It may help to clean and re-lube the linkages between the cruise control and throttle. They get pretty gunked up. Pop them apart, clean them, and re-lube with ATF or similar light oil.

Some CCs seem to just surge when not under load. You can try pressing the accelerator slightly--that'll sometimes eliminate the surge.
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