Deceleration Control System: Operation

The anti-afterburn valve (actuated by anti-afterburn solenoid) supplies additional air from air cleaner to intake manifold at initial deceleration mode and after ignition is switched "OFF" to prevent afterburning of fuel. On Man. Trans. models, the coasting valve and richer solenoid operate together to supply air (coasting valve) and fuel (richer solenoid) during deceleration at engine speeds above 1150 RPM to prevent backfiring. On all models, the power valve solenoid closes the vacuum passage to carburetor power valve to supply additional fuel during heavy load and transient operating conditions.