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Home >> Buick >> 1994 >> Roadmaster Base >> Repair and Diagnosis >> Engine Performance >> Engine Controls - Adjustments >> Idle Speed & Mixture >> IAC Valve Reset

IAC Valve Reset

Idle speed is ECM/PCM controlled. Resetting of IAC valve pintle is the only adjustment that can be performed. To reset IAC valve pintle position, depress accelerator pedal slightly. Start engine, and release accelerator pedal. Run engine for 5 seconds. Turn engine off for 10 seconds. Restart engine, and check for proper idle operation.