Idle speed fluctuats from day to day. on 1998 Ford Taurus

usually when first started.

by in Springfield, MO on April 06, 2014
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2 answers
ANSWER by , April 06, 2014
Idle air control valves are know to have high failure rates. Throttle body plates get gummed up and stick. You can try cleaning the throttle body.
ANSWER by , April 06, 2014
Also a common problem,, vacuum leaks! Check pcv system...