Evaporative Check Valve: Testing and Inspection

Check Valve Inspection





1. Remove check valve.
2. Inspect check valve.





(a) Check that air flows from the blue port to the black port.
(b) Check that air does not flow from the black port to the blue port.
^ If operation is not as specified, replace the check valve.

3. Reinstall check valve.





HINT: Install the check valve with the black port facing the purge port side of the throttle body.