Fuel Tank and Lines

FUEL TANK AND LINES

Gasoline Engines
The gasoline fuel system consists of:
- the fuel tank, there are 3 available fuel tanks.
- The midship fuel tank is mounted to the LH frame side rail.
- The auxiliary fuel tank is mounted to the LH frame side rail.
- The aft-of-axle fuel tank is mounted between the side rails.

- a fuel tank filler pipe which contains a restrictor plate to permit only unleaded fuel to be pumped into the fuel tank.
- a 1/4 turn fuel tank filler cap.
- a fuel filter providing filtration to protect the fuel injectors.
- fuel and vapor tubes.
- a fuel rail-mounted fuel pressure and temperature sensor.
- a fuel pump (FP) which provides pressurized fuel to the engine and contains:
- a serviceable fuel sender.
- an inlet filter.
- a check valve which maintains system pressure after the FP is shut off.
- a pressure relief valve for overpressure protection in the event of restricted flow.

- an inertia fuel shutoff (IFS) switch
- a fuel pump driver module (FPDM)

The fuel tank stores the liquid fuel. Electrical power to the FP is provided through the IFS switch. The fuel pump module is controlled by the FPDM. The fuel pump provides fuel to the fuel rail through the fuel supply tube. Vapor tubes route fuel vapor to the EVAP canister and the intake manifold through the EVAP canister purge valve.

Diesel Engines
The diesel fuel system consists of:
- the fuel tank, there are 3 available fuel tanks.
- The midship fuel tank is mounted to the LH frame side rail.
- The auxiliary fuel tank is mounted to the LH frame side rail.
- The aft-of-axle fuel tank is mounted at the rear of the frame between the side rails.

- a fuel tank filler pipe without a restrictor plate.
- fuel tubes.
- a threaded fuel tank filler cap.
- the fuel conditioning module.
- contains a fuel filter and water separator to protect the fuel injectors.
- contains an in-line FP which provides pressurized fuel to the engine and contains a pressure relief valve for overpressure protection in the event of restricted flow.
- is frame mounted.

- an IFS switch
- a vapor tube (midship fuel tank)

The fuel tank stores the liquid fuel. The FP is controlled by the FP PCM relay. Electrical power to the FP is provided through the IFS switch. The fuel supply tubes route fuel from the fuel tank to the engine and the fuel return tubes route unused fuel from the engine back to the fuel tank.