Canister Purge Control Valve: Testing and Inspection

1. Disconnect the vacuum hose at the canister purge valve. Attach a vacuum test hose and pump to the valve.
2. Disconnect the vapor line (coming from the EVAP canister) and blow through the valve. Canister purge valve should be closed and air stream should be blocked.
3. Apply vacuum to vacuum connection with the pump. Make sure that the canister purge valve does not "bleed off" vacuum.
4. Blow through canister purge valve at disconnected vapor line connector. Canister purge valve should now be open and air stream should be unrestricted.
5. If canister purge valve fails any of the tests above, replace and retest with new valve.
6. Disconnect the test equipment and reconnect the vacuum and vapor hose.