See Figure 1
REMOVAL & INSTALLATION
It is necessary to remove the fuel tank.
- Depressurize the fuel system.
- Remove the fuel from the tank by pumping it out through the filter tube.
- Disconnect the supply fitting, return line fitting and the vent line.
- Disconnect and remove the fuel filter tube.
- Unplug the electrical connections to both the fuel sender and the fuel pump wiring harness.
- Remove the fuel tank support straps and remove the fuel tank.
- Remove any dirt that has accumulated around the fuel pump attaching flange, to prevent it from entering the tank during service.
- Turn the fuel pump locking ring counter-clockwise using a locking ring removal tool and remove the locking ring.
- Remove the fuel pump and bracket assembly.
- Remove the seal gasket and discard it.
- Put a light coating of heavy grease on a new seal ring to hold it in place during assembly. Install it in fuel tank ring groove.
- Install the tank in the vehicle.
- Install the electrical connector.
- Install the fuel line fittings and tighten to 30-40 ft. lbs (40-54 Nm).
- Install a minimum of 10 gallons of fuel and check for leaks.
- Install a pressure gauge on the throttle body valve and turn the ignition ON for 3 seconds. Turn the key OFF , then repeat the key cycle five to ten times until the pressure gauge shows at least 30 psi. Reinspect for leaks at the fittings.
- Remove the pressure gauge. Start the engine and check for fuel leaks.
The diagnostic pressure valve (Schrader valve) is located on the fuel rail on multi-point systems. This valve provides a convenient point for service personnel to monitor fuel pressure, release the system pressure prior to maintenance, and to bleed out air which may become trapped in the system during pressure replacement. A pressure gauge with an adapter is required to perform pressure tests.
If the pressure tap is not installed or an adapter is not available, use a T-fitting to install the pressure gauge between the fuel filter line and the throttle body fuel inlet or fuel rail.
Testing fuel pressure requires the use of a special pressure gauge (T80L-9974-A or equivalent) that attaches to the diagnostic pressure tap fitting. Depressurize the fuel system before disconnecting any lines.