Electric Air Switching Valve

The air switching valve is a spring actuated 2-way valve. This valve is located in series between air control valve and exhaust system.

When the solenoid is de-energized, vacuum is applied to diaphragm chamber, resulting in airflow to exhaust ports.

When the solenoid is energized, vacuum to diaphragm chamber is blocked and chamber is vented to atmosphere. This allows spring tension to open port to the catalytic converter and close engine port.