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Engine Idling

Engine

Vehicle Information: Year: 89C4; Body Type: Coupe; Total Mileage: 71,000;

My 1989 C4 seems to have an idling problem on a sporadic basis. When coming to a stop it idles down to about 2-3 rpms and struggles to get to 700. It surges. The dealer, on two occasions tells me it is the idle adjustment switch and they "fix"it. Shortly there after, a week this time, it is starting to do this again. This is always in the afternoon going home, never in the morning going to work. Any ideas.

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