Fuel Pressure Release: Service and Repair

WARNING: Do not smoke, carry lighted tobacco or open flame of any type when working on or near any fuel related component. Highly flammable mixtures are always present and may be ignited, resulting in possible personal injury.

CAUTION: Fuel supply lines will remain pressurized for long periods of time after engine shut down. This pressure must be relieved before servicing of the fuel system is begun. A valve is provided on the throttle body for this purpose. Remove the air cleaner and relieve system pressure by using Rotunda pressure gauge tool T80L-9974-A or equivalent and drain the system through the drain tube.

1. Remove fuel tank cap.
2. Disconnect the vacuum hose from the fuel pressure regulator located on the engine fuel rail.






3. Using a hand vacuum pump, apply about 84.2kPa (25 in. Hg) of vacuum to the pressure regulator. Fuel pressure will be released into the fuel tank through the fuel return hose.

NOTE: When using a vacuum pump to relieve system pressure, it may take up to 3 minutes, to bleed system pressure.