Question about GMC Yukon

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To whom it may concern. i have a 1994 gmc yukon with a 5.7. it seems to run rough at an idle. i have replaced the plugs,fuel filter,air filter. throttle body gasket,wires,aic,egr valve,egr solenoid. it runs fine otherwise. it idles at about 800 rpm in park and about 650 in drive.some times i can feel a miss when the engine is cold and occasionally idles high in the cooler months after it is completly warmed up.you can even see the tensioner pully move back and forth at an idle. the belt and pully have also been replaced. any help would be appreciated

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Clean your maps with sensor cleaner

Posted on Aug 24, 2010

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