Purge Valve

Purge Valve

The ECM controls the operation of the purge valve on the Y/O wire. The valve remains closed when the engine is cold and at idling speed to protect engine tune and catalyst performance. When the coolant is above 70°C, the purge valve solenoid will be modulated ON and OFF whenever the engine speed is above 1500 rev/min and the manifold absolute pressure is below 30kpa. When the purge valve is open fuel vapour from the charcoal cannister is drawn into the throttle housing for combustion.