EGR System - Gasoline: Description

All vehicles are equipped with an exhaust gas recirculation (EGR) system to reduce NOx emissions. With this system, exhaust gas is partially recirculated from an exhaust port of the cylinder head into a port located at intake manifold below the carburetor.

Exhaust gas flow is controlled by a vacuum operated dual EGR valve and a throttle operated sub EGR valve. Vacuum applied to the EGR valve is controlled by a dual thermo valve.