Air Injection System: Testing
- Start the engine. Disconnect upper wire from the thermocontact and alternately put it in contact with lower wire on thermocontact.
- The pulse air valve should hum slightly and diaphragm movement should be seen through the upper section. If so, system is okay. Reconnect wire.
- If not, check operation of the electrovalve, electrical and vacuum hose connections. If okay, replace electrovalve.