Thread: RPM fluctuation
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Old 07-12-2017, 06:01 AM   #2
jcslocum
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Join Date: Aug 2015
Location: Eastern Shore, MD
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This kinda sounds like a vacuum leak to me. You should begin looking at the rubber in the engine bay for cracks. On our 2000 we have been chasing vacuum leaks for 2 years and the brake booster diaphragm finally failed. it wasn't even on our radar as the source of the problem.

A smoke test would help locate any leaks.
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