Econoline E350 1 Ton V8-5.4L Prop SOHC VIN Z (1998)
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Verify repair by utilizing a metered air pressure test
EVAP CANISTER PURGE VALVE NO FLOW TEST
1.
Using WDS Datalogger select the following PID's: EVAPVM # (or EVMV#), EVAPCV # and FTP.
2.
Start the vehicle.
3.
Close both the Canister Vent Solenoid (CVS) (EVAPCV # On or 100% duty cycle) and the EVAP Canister Purge Valve (EVAPVM# Off or zero
% duty cycle).
4.
While monitoring the FTP PID, command open the EVAP Canister Purge Valve with the EVAPVM# PID to 100% duty
5.
If the FTP decreases and/or the RPM changes and/or the engine stalls, the test passed. Turn off engine and proceed to test procedures below.
Otherwise replace the EVAP Canister Purge Valve, verify the repair by repeating the No Flow Test and return vehicle.
SYSTEM LEAK CHECK (SMOKE TEST PROCEDURE)
1.
Disconnect the larger of two manifold vacuum lines at the EVAP Canister Purge Valve and cap it at the EVAP Canister Purge Valve (see Figure
2).
2.
Connect the Smoke Machine power cables to vehicle battery The "Power Indicator Lamp" should be on indicating a good battery contact.
3.
Position the selector valve on Rotunda's Smoke Machine Control Panel to "SMOKE".
4.
Locate the vehicle's Evaporative Emission Service Test Port and remove the green cap. The EVAP Service Test Port is located close to or on the
EVAP Canister Purge Valve.
