HOLDEN GEN III V8, Service Training

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GEN III V8 ENGINE MANAGEMENT
FUEL SYSTEM
BASIC FUEL SYSTEM OPERATION
The fuel control system used on the GEN III V8 is a "Returnless" or "Demand" system. The fuel system starts
with the fuel in the fuel tank. A single in-tank high pressure fuel pump with an integrated fuel pressure regulator
(located inside a modular fuel sender assembly) is used. From the high pressure pump, fuel flows through a fuel
filter, then back into the fuel tank via the fuel pressure regulator. Fuel is supplied to the fuel rail and injectors by
a single fuel feed line.
The high pressure in-tank single pump is capable of providing fuel at more than 410 kPa. A pressure regulator in
the modular fuel sender assembly maintains the fuel pressure at a regulated pressure of 410 kPa.
The injectors, located in each runner of the intake manifold just ahead of the inlet ports to the cylinder head, are
controlled by the PCM. They deliver fuel in one of several modes. The fuel pump is energised by the PCM via
the fuel pump relay.
SYSTEM COMPONENTS
The Fuel Control System is made up of the following components:
• PCM
• Fuel Tank
• Modular fuel sender assembly
• Fuel pump assembly
• Fuel pressure regulator
• Fuel filter
• Fuel pressure supply line
• Fuel pump relay
• Fuel rail
• Injectors
Fuel Delivery System
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