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abnormal idle


88FOXBODY

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my beater civic 1998 d16 motor has a odd idle sometimes its fine other times it acts like i have a cam out of my old foxbody lopin like crazy any ideas? i have check the O2 sensors and i dont have any check engine light and it doesnt have a mass air flow sensor only thing i can find is a small sensor on the air box but it cant be a mass air flow
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Does it do it when it's hot or cold? Surging idle? Or just low idle?

 

 

Either way, it still wouldn't hurt to pull the IAC off of the car and spray it out with some brake clean. Should be on the back of the intake manifold, near the throttle body. 2 12mm head bolts and 2 vacuum lines. D16Y8? Or D16Y7?

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