Fuel Tank and Lines

Fuel Tank and Lines

The fuel system consists of:

- a Multi-Port Fuel Injection (MFI) system.

- a 2-speed Mechanical Returnless Fuel System (MRFS).

- Easy FuelTM (capless) fuel tank filler pipe assembly.

- a fuel tank filler pipe containing:
- a recirculation tube.

- a fresh air hose.

- a restrictor plate to permit only unleaded fuel to be pumped into the tank.


- a fuel tank.

- a Fuel Pump (FP) module containing:
- an electric FP (Fuel Pump), which provides pressurized fuel to the fuel rail.

- a lifetime fuel filter serviced as part of the FP (Fuel Pump) module.

- a serviceable fuel level sender.

- a check valve, which maintains system pressure after the FP (Fuel Pump) is shut off.

- a pressure relief valve for overpressure protection in the event of restricted fuel flow.


- fuel, vapor and brake tubes in an integrated bundle assembly attached to the underside of the vehicle by retaining clips.

- a fuel rail.

- fuel injectors.

- fuel pump control module.

The fuel tank filler pipe cannot be modified in any way.

The vehicle is equipped with electronic Multi-Port Fuel Injection (MFI) that is supplied by a 2-speed Mechanical Returnless Fuel System (MRFS). The PCM is able to maintain constant fuel pressure by varying the FP (Fuel Pump) output. This is accomplished by increasing or decreasing voltage supplied by the fuel pump control module to the FP (Fuel Pump) based on the duty cycle request from the PCM. The returnless fuel system offers improved economy, lower fuel temperatures and decreased fuel vapor in the fuel tank.

Fuel Pump (FP) Shut-off Feature

In the event of a moderate to severe collision, the vehicle is equipped with a Fuel Pump (FP) shut-off feature that is initiated by the event notification signal.

The event notification signal is a signal provided by the Restraints Control Module (RCM) to the FP (Fuel Pump) control module. Signal communication between the RCM (Restraints Control Module) and the FP (Fuel Pump) control module allows the PCM to shut-off the FP (Fuel Pump).

Should the vehicle shut off after a collision due to this feature, the vehicle may be restarted by first turning the ignition switch to the OFF position and then turn the ignition switch to the ON position. In some instances the vehicle may not start the first time and may take one additional key cycle.