EVAP canister purge valve is part of Enhanced EVAP system that is controlled by PCM. See Fig. 65 and Fig.
66 . This valve controls flow of vapors (purging) from EVAP canister to intake manifold during various engine
operating modes. EVAP canister purge valve is a normally closed valve. The electronic EVAP canister purge
valve controls the flow of vapors electronically by way of a solenoid thereby, eliminating the need for an
electronic vacuum regulator and vacuum diaphragm. See Fig. 67 .
Fig. 65: Identifying EVAP Canister Purge Valve (Escort, Focus, LS, Mustang, Sable, Taurus &
Thunderbird)
Courtesy of FORD MOTOR CO.
2003 Ford Pickup F150
2003 ENGINE PERFORMANCE Theory & Operation - CNG, Flex-Fuel & Gasoline