engine idle how can it be ajusted

Asked by Aug 02, 2015 at 11:11 AM about the 2004 Chevrolet TrailBlazer LT 4WD

Question type: Maintenance & Repair

2 Answers

16,850

First try cleaning throttle body and Idle Air Control valve or mass air flow sensor depending on which one your vehicle has. Also check air filter.

78,425

On your rig it is not adjustable, if the idle is too high look for a vacuum leak, if none are found then have the codes checked for a possible sensor or actuator malfunction.

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