Air Injection System: Description

The air injection systems, used in many applications (may vary according to engine and equipment), are designed to reduce carbon monoxide and hydrocarbon emissions. This is done by injecting fresh air at critical points in the exhaust manifold to burn those gases which passed through the combustion cycle.

System consists of an air pump with integral filter, diverter/by-pass valve, check valve(s), external or internal injection tubing and connecting hoses. Some Ford and all Chrysler models use additional valves, depending on applications. These valves are explained below.