Normal Operation
WARNING: This page is about a different car, the 2009 Mercury Grand Marquis and 2009 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.
Under normal operation, fuel should flow at a steady rate through the fuel tank filler pipe into the fuel tank. As fuel enters the fuel tank, air is vented through the filler pipe or the On-Board Refueling Vapor Recovery (ORVR) system.
This pinpoint test is intended to diagnose the following:
- Fuel tank filler pipe fresh air hose or recirculation tube, if equipped
- Fuel tank filler pipe
- Evaporative Emission (EVAP) system
- Fuel tank filler pipe check valve (part of the fuel tank filler pipe assembly)
- Fuel Limit Vent Valve (FLVV) (mounted on the fuel tank)