Electric Air Switching Valve

The air switching valve is a spring biased 2-way valve that is located in series between the air control valve and the exhaust system. When the solenoid is de-energized, a vacuum is applied to the diaphragm chamber to provide air flow to the exhaust ports. When the solenoid is energized, vacuum to the diaphragm chamber is blocked and the chamber is vented to the atmosphere. This allows the spring to open the port to the catalytic converter and close the port to the engine.