Air Injection System: Description

The air injection system is used to add secondary air to exhaust ports for further burning of hot exhaust gases. System consists of an air pump with a built-in relief valve, a check valve, an air injection manifold with air injection nozzles, an air switching valve, and a mixture control valve.

The mixture control valve prevents backfiring in the exhaust system during deceleration. In addition, California models use an electrically controlled vacuum switching valve.