Metering System Components

Purpose

The function of the fuel metering system is to deliver the correct amount of fuel to the engine under all operating conditions.

Fuel is delivered to the engine by individual fuel injectors and poppet nozzles mounted in the intake manifold near each cylinder.


Fuel Metering System Components

The fuel metering system consists of the following parts:

- The fuel supply components (fuel tank, pump, lines)

- The fuel pump electrical circuit

- The fuel meter body assembly which includes the following components:

- The fuel injectors and poppet nozzles

- The fuel pressure regulator

- The electrical wiring harness

- The upper manifold assembly which includes the following items:

- The throttle body

- The Idle Air Control (IAC) valve

- The Throttle Position (TP) sensor

- The Manifold Absolute Pressure (MAP) sensor