Air Injection: Description and Operation

DESCRIPTION
This system is designed to improve emissions performance by supplying fresh air from the air cleaner into the exhaust manifold through the Pulsed Secondary Air Injection (PAIR) valve.

OPERATION
When the PAIR control solenoid valve is activated, manifold vacuum raises the diaphragm valve of the PAIR valve. Fresh air from the air cleaner is introduced into the exhaust manifold through the reed valve of the PAIR valve by the pulsation of the exhaust gas.