General Information

The fuel system is comprised of two subsystems. The fuel supply system and the fuel metering system. The correct amount of fuel can not be delivered to the engine cylinders without the supply of air from the air intake system. The Powertrain Control Module (PCM), along with the information sensors and switches, controls the activity between all three systems.

The following are the main components of the vehicle's fuel supply system:
^ The fuel rail assembly
^ The fuel pressure regulator
^ The fuel pump
^ The fuel tank
^ The fuel filter
^ The fuel feed pipes and hoses
^ The fuel return pipes and hoses

This vehicle is equipped with a Sequential Fuel Injection (SFI) system. The function of the fuel metering system is deliver the correct amount of fuel to the engine under all operating conditions. The main component of the vehicle's fuel metering system is the fuel injectors. There is one fuel injector for each cylinder. The fuel injectors are controlled sequentially by the PCM. The PCM bases the control of the fuel injectors on several important engine parameters. These engine parameters include the following:
^ The Mass Air Flow (MAF) sensor
^ The Intake Air Temperature (IAT) sensor
^ The Engine Coolant Temperature (ECT) sensor
^ The Throttle Position (TP) sensor
^ The engine speed (RPM)
^ The Heated Oxygen Sensor (HO2S)