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Idle problem: motor revs up and down at idle

Idle problem: motor revs up and down at idle

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It sounds like your idle control valve needs cleaning or replacing

Posted on Oct 08, 2009

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SOURCE: 94 blazer vortec 4.3 idle revs up and dont come down

check your Throttle Positioning sensor that should fix your rough idle the TPS controls the breather on the front of the engine its affixed to the right hand side of the throttle body just infront of the spyder on the V6 Vortec 4.3L Models

Posted on Nov 15, 2008

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