Idle Air Control Valve Wiring Diagram. This metered air controls the idle speed. The fast idle valve is an open/close solenoid vacuum control valve to admit more air to the intake manifold when cold.
The idle air control valve — also known as the idle speed control valve — regulates the idle speed of your engine. Gain access to the iac valve. On my car, the plastic housing of the connectors is broken off leaving two bare wires, each soldered to a metal connector.
