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The engine idles faster than usual by more than 500 rpms. Replace what part?

(1990 Pontiac Bonneville)
in Webster, TX on January 15, 2015
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Popular Answer
on January 15, 2015
Ck throttle body gasket leaks drawing air"sucking air somewere"
on July 01, 2015
probably need to change iac (idol air control) sensor or map sensor, or throttle positoning sensor.
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