F 450 4WD Super Duty V10-6.8L VIN D (2004)
Canister Purge Control Valve: Description and Operation
EVAP CANISTER PURGE VALVE
EVAP Canister Purge Valve
Electronic EVAP Canister Purge Valve
The EVAP canister purge valve (Figure 101) is part of the Enhanced EVAP system that is controlled by the PCM. This valve controls the flow of vapors
(purging) from the EVAP canister to the intake manifold during various engine operating modes. The EVAP canister purge valve is normally closed
valve. The electronic EVAP canister purge valve (Figure 102) controls the flow of vapors electronically by way of a solenoid thereby, eliminating the
need for an electronic vacuum regulator and vacuum diaphragm. The PCM outputs a signal between 0% and 100% duty cycle to control the EVAP
canister purge valve. On applications with Electronic EVAP canister purge valve, the PCM outputs a signal between 0 mA and 1000 mA to control the
solenoid.
