Fuel System: Notes

The fuel system consists of:

• a 1-speed Mechanical Returnless Fuel System (MRFS) with sequential Multi-Port Fuel Injection (MFI).
• a standard fuel tank.
• a Fuel Tank Pressure (FTP) sensor incorporated in the fuel vapor tube assembly (part of the fuel tank assembly).
• a Fuel Pump (FP) module containing:
  • an electric FP, which provides pressurized fuel to the fuel rail.
  • a serviceable fuel level sender mounted on the FP module.
  • 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 fuel flow.
  • a lifetime fuel filter (serviced as part of the FP module).
• a fuel rail.
• an electronic FP module which is enabled by the PCM to control fuel rail pressure.
• separately controlled fuel injectors for each cylinder. The fuel injectors are mounted to the intake manifold and supplied with pressurized fuel from the FP module to the fuel rail.
• fuel, vapor and brake tubes in an integrated bundle assembly attached to the underside of the vehicle by retaining clips.
• a one-fourth turn vented type fuel tank filler cap.
• a fuel tank filler pipe which:
  • has a recirculation tube.
  • has a fresh air hose.
  • has a restrictor plate to permit only unleaded fuel to be pumped into the tank.
  • cannot be modified in any way and is serviced only by the installation of a new fuel tank filler pipe.
• an IFS switch located behind the RF lower cowl trim panel.