Fuel Metering System

Fig 1: Fuel Metering System Diagram

Courtesy of GENERAL MOTORS CORP.

The fuel metering system is made up of the following parts:

• Fuel supply components (fuel tank, pump, filter, regulator and lines).
• Fuel pump electrical circuit.
• Fuel rail assembly, including:
  • Fuel injectors.
  • Pressure regulator.
• Throttle body assembly:
  • Idle Air Control (IAC) valve.
  • Throttle Position (TP) sensor.