RPMs increase in warm, humid weather.

15

Asked by Aug 29, 2016 at 10:37 AM about the 2001 Oldsmobile Silhouette 4 Dr GL Passenger Van Extended

Question type: Maintenance & Repair

When start engine, RPMs stay about 800, but when driving in warm (70 and
up), muggy weather the RPMs increase to above 2000 and will not go below
that unless I stand on the brake. I have to pull over, turn off the engine and
restart it to get the RPMs back to normal idle. Any Ideas?

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