An idle air control actuator or idle air control valve (IAC actuator/valve) is a device commonly used in fuel-injected vehicles to control the engine's idling RPM.

Symptoms: Poor acceleration, jerking when driving, rough idling / surging, engine stalling, increased fuel consuption, engine management light (EML / Check Engine Light) on.

Also Known As: Stepper Motor, IACV, ICV, Idling Valve, Idle Air Control Actuator

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