System

Fuel Delivery System:

PURPOSE
Electronic Fuel Injection (EFI) delivers precise air/fuel mixture to the engine at the proper time under all operating conditions. This results in optimum engine performance and lowest possible levels of unburned hydrocarbons, carbon monoxide and nitrogen oxides in the exhaust gases.

CONSTRUCTION
The fuel delivery system consists of:
- a high pressure electrical fuel pump mounted in-tank,
- fuel filter,
- fuel pressure regulator,
- fuel injectors,
- fuel pump switch (located in the VAF meter),
- fuel pump relay,
- fuel tank,
- inertia switch
- and connecting lines.

OPERATION
Fuel pressure across the fuel injectors is maintained by a pressure regulator. Because fuel pressure is a constant when fuel demand is not, the system includes a fuel return line that allows excess fuel to flow back through the regulator to the fuel tank. The amount of fuel the injectors will spray under a particular operating condition is determined by an Electronic Control Assembly (ECA). The ECA receives signals from sensors that monitor airflow to the engine, engine coolant temperature, engine vacuum conditions, oxygen content, etc.