Air Injection Systems: Description

Courier models use two types of air injection systems. On California models, an air pump, by-pass valve, check valve, air control valve and injection manifold are used. On Federal models, a special reed valve takes the place of the air pump. It reacts to exhaust system pulsations to draw fresh air into the system. This system consists only of the reed valve (which also acts as a check valve) and injection nozzle.