Vibe FWD L4-1.8L VIN 8 (2004)
6. Blow air through the upper port of the EVAP vent valve. Air has to flow freely through the lower port.
7. Replace the valve if the air does not flow through the upper port.
8. Apply battery voltage across the solenoid terminals.
9. Blow air through the upper port of the solenoid. Air should NOT flow through the valve.
10. Replace the solenoid if the solenoid fails any of the tests.