Fuel Metering System

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

• Fuel rail assembly, including:
  • Fuel injectors
  • Pressure regulator
• Throttle body assembly, including:
  • Idle Air Control (IAC) valve
  • Throttle Position (TP) sensor

Fig 1: Fuel Metering System

Courtesy of GENERAL MOTORS CORP.