Question about 2005 Chevrolet Colorado

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My 2005 Colorado RPM's fluctuate on a cold start up, from normal down to 500 Rpm. The truck starts fine, but as soon as I have to push the clutch in and stop, the Rpms will fluctuate about 3x and then it returns to normal Rpms. It will not do this again after the truck in started again, from a cold start.

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My 2005 Colorado RPM's fluctuate - eddyblueange_2.jpgThis is an idle valve after 1996 the ecu control the idleing from the engine with this air by pass if this valve is geting bad it can get stuck open or closed or dont working right is an electric selenoid ......... listen for air leaks ....... wen you push the clutch you push the brake too check the brake booster

Posted on Dec 28, 2010

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Posted on Jan 02, 2017

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May be an iac motor slow to react to change in load. RPM will change when shifting or engaging/disengaging clutch. Does not sound serious yet ... If you can, compare with similar vehicle and see it it does the same.

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