Anti-AFTERBURN Valve

On 1977-78 models, the anti-afterburn valve is located on right side of engine (near carburetor). The valve is connected by tubing to air cleaner, intake manifold and, on some models, to air pump and air control valve. Air is drawn from air cleaner, through anti-afterburn valve, into intake manifold in varying amounts depending on engine requirements. When throttle valve closes, manifold vacuum increases and draws air from anti-afterburn valve directly into intake, by-passing carburetor. This extra induction of air balances the air/fuel mixture and reduces HC emissions.

On 1979 models, the anti-afterburn valve is located between air cleaner and intake manifold, this valve adds fresh air directly to intake manifold from air cleaner to balance air/fuel mixture.