Air Injection System - CALIF: Operation

Filtered air is drawn from air cleaner by air pump and directed under pressure to air control valve. The No. 1 relief valve of air control valve diverts part of air pump air back to air pump when engine is operating under heavy load conditions and to the air cleaner at high engine RPM.

The No. 2 relief valve of air control valve regulates the amount of air injected, based upon intake manifold vacuum and coolant temperature. The air injection system also contains water thermo valve, delay valve and check valves to control and protect the air injection system.