Fuel Delivery and Air Induction: Description and Operation

Fuel Supply System:

TYPE

The fuel delivery system is a Sequential Multi-Port Fuel Injection (SFI) type.


PURPOSE

The fuel delivery system supplies engine with correct amount of fuel at correct pressure.


CONSTRUCTION

The fuel delivery system consists of a fuel tank, fuel pump, fuel filter, fuel pressure regulator, fuel rail, six fuel injectors and associated lines.


OPERATION

Fuel is pumped from the fuel tank to the fuel injectors through the fuel filter, fuel rail and the pressure regulator, by the electric in-tank fuel pump.

The vacuum assisted regulator maintains pressure at injectors by allowing excess fuel to return to tank via return line.

The Powertrain Control Module (PCM) controls the amount of fuel injected by controlling the length of time injectors are energized, this period of time is known as "injector pulse width".

The injectors are fired individually, with each injector firing once per intake stroke.