Canister Purge Control Valve: Testing and Inspection

Fig. 35 - Testing Purge Control Valve:

1. Disconnect vacuum sensing tubes from water thermo valve and from intake manifold at purge control valve.

2. Plug vacuum sensing tube to intake manifold.

3. Start engine and operate at idle.

4. Connect a hose to inlet port "b" of valve and lightly apply air pressure to valve. No air should flow through valve.

5. Disconnect vacuum sensing tube from intake manifold and connect tube to water thermo port "a" of purge control valve. Again, lightly apply air pressure to port "b." Air should pass through valve.