Description

Fig. 48 Air Injection System Diagram:

This system is designed to improve emissions performance by supplying fresh air from the air cleaner into the exhaust manifold through the air suction valve. This promotes more complete fuel burning before the exhaust reaches the catalytic converter.
When the air suction valve is activated, manifold vacuum raises the diaphragm of the air suction valve and fresh air from the air cleaner is induced into the exhaust manifold through the reed valve of the air suction valve by the pulsation of the exhaust gas.