Champ L4-1410cc 1.4L SOHC VIN 2 2-BBL (1982)
Fig. 6 Secondary air supply system. Models less pulse air feeder w/secondary air valve (Typical)
MODELS LESS PULSE AIR FEEDER
On this system, Figs. 5 and 6, the reed valve(s) supplies air into the exhaust manifold to promote further oxidation of exhaust emissions. Vacuum
in the exhaust manifold, caused by pulsations of the exhaust valves, actuates the reed valve(s) and supplies air drawn from the air cleaner to the
exhaust manifold and/or rear catalytic converter, depending on application.
On some models, a secondary air control valve is opened by intake manifold pressure when solenoid valve is energized by the ECU. The ECU
energizes the solenoid valve based on coolant temperature, intake air flow, engine speed, ignition switch position and idle position.