Lancer Evolution L4-2.0L DOHC Turbo (2003)
Refueling Control Valve: Testing and Inspection
ORVR VENT VALVE MODULE CHECK
1. Blow air through orvr vent valve module nipple (A). Check that the air flows out of nipple (B) and nipple (C).
2. Connect a hand vacuum pump to nipple (A) of the orvr vent valve module
3. With air flow through nipple (C) obstructed, apply a vacuum and check that the vacuum is maintained.