Coasting Richer System: Description

Coasting richer system is used to prevent excessive emissions which could be created when engine is decelerating or coasting. A lean mixture, resulting from closed throttle valve for extended period of time, will create inefficient combustion. This system richens air/fuel mixture through an auxiliary fuel supply system. Coasting richer system consists of transmission switch, clutch switch, accelerator switch, engine speed sensor (if equipped), and coasting richer solenoid valve.