Fuel System

Fuel System

The fuel system consists of the:

• saddle-type fuel tank.
• Fuel Pump (FP) module.
• lifetime in tank fuel filter on 3.7L and 5.0L (4V) vehicles (serviced as part of the FP module).
• fuel level sensor.
• Easy Fuel ^TM (capless) fuel tank filler pipe assembly.
• fuel rail.
• fuel injectors.
• fuel rail pressure and temperature sensor on 5.8L (4V) vehicles only.
• inline fuel filter on 5.8L (4V) vehicles only.
• Fuel Tank Pressure (FTP) sensor (part of the fuel vapor tube assembly).
• fuel tubes (liquid and vapor).
• Fuel Pump Control Module (FPCM).

The vehicle:

• utilizes an Electronic Returnless Fuel System (ERFS) on 5.8L (4V) vehicles and a Mechanical Returnless Fuel System (MRFS) on 3.7L and 5.0L (4V) vehicles.
• has a saddle-type fuel tank.
• has a FP module in the LH saddle of the fuel tank that supplies fuel under pressure to the fuel rail.
• has a serviceable fuel level sender mounted on the FP module.
• has a fuel level sensor in the RH saddle of the fuel tank.
• has an Easy Fuel ^TM (capless) fuel tank filler pipe assembly, which cannot be modified in any way.
• has a supplemental refueling adapter located in the luggage compartment.
• is equipped with a sequential Multi-Port Fuel Injection (MFI) system.
• has fuel tubes (liquid and vapor) mounted on the underside of the vehicle in a bundle.
• has a FTP sensor (part of the fuel vapor tube assembly).
• uses separately controlled fuel injectors for each cylinder. The fuel injectors are mounted to the intake manifold.
• fuel injectors are supplied with pressurized fuel from the FP module to the fuel rail.
• fuel injection rail pressure is controlled by the electronic FP module which is enabled by the PCM.
• has a Fuel Pump Control Module (FPCM) that shuts off fuel in the event of a collision.

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 Fuel Pump Control Module (FPCM). The FPCM will then shut-off power to the FP module. The RCM will also send a fuel shut-off signal to the Powertrain Control Module (PCM). The PCM will then send a signal to the FPCM to shut-off the FP module.

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.