Fast Idle Control Valve
A thermowax plunger controls this valve. When the engine is cold, the valve allows additional air to be by-passed into the intake manifold to increase engine speed. The valve closes when engine reaches operating temperature.
A thermowax plunger controls this valve. When the engine is cold, the valve allows additional air to be by-passed into the intake manifold to increase engine speed. The valve closes when engine reaches operating temperature.