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To adjust the idle on a 1999 Chevy Tracker, first, ensure the engine is at normal operating temperature. Locate the idle air control (IAC) valve on the throttle body; you may need to remove the air intake duct for better access. Carefully adjust the IAC screw, turning it clockwise to increase idle speed or counterclockwise to decrease it, while monitoring the RPMs. After making adjustments, check for any vacuum leaks and reset the vehicle’s computer by disconnecting the battery for a few minutes to allow the new idle settings to take effect.

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3w ago

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