Refueling EVAP Vapor Cut Valve Test
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2003 Infiniti QX4, 2003 Infiniti Q45, 2003 Infiniti M45, 2003 Infiniti I35, and 2003 Infiniti G35. However, it is still accessible from the selected car via links, so may be relevant.
- Remove fuel tank. Remove fuel level sensor unit retainer. Drain fuel from tank using a hand pump. To check if refueling EVAP vapor cut valve is stuck closed, blow air into refueling EVAP vapor line. See Figure. If air flows freely into fuel tank, go to next step. If air does not flow freely into fuel tank, replace fuel tank.
- To check if refueling EVAP vapor cut valve is stuck open, connect a vacuum pump with a "T" to signal line and refueling EVAP vapor line. See Figure. Remove fuel gauge/fuel level sensor unit. Invert fuel tank. Apply 3.94 in. Hg (13.3 kPa) of vacuum to signal line and refueling EVAP vapor line. If vacuum does not hold with fuel tank upside down, replace fuel tank. If vacuum holds with fuel tank upside down, refueling EVAP vapor cut valve is okay.