Description & Operation

Valve is mounted on intake manifold adjacent to carburetor. Purpose of valve is to meter an additional amount of air/fuel to engine during periods of deceleration. When decelerating, manifold vacuum forces diaphragm assembly against the spring which in turn raises (opens) decel valve. With valve open, existing manifold vacuum pulls a metered amount of air/fuel from the carburetor and travels through the valve body assembly into the intake manifold.