HOLDEN GEN III V8, Service Training

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GEN III V8 ENGINE MANAGEMENT
Fuel Pressure Regulator
The fuel pressure regulator is a diaphragm
operated relief valve with fuel pump pressure on
one side and atmospheric pressure combined with
mechanical spring pressure on the other. The
function of the regulator is to maintain a regulated
pressure at the injectors at all times by controlling
the flow into the return line.
Pulsation Damper
The fuel pulsation damper is located on the fuel
rail. The dampener is diaphragm operated with fuel
pressure on one side and spring pressure on the
other.
IMPORTANT: The procedure detailed in the
Service Manual for filter replacement, MUST be
followed, both in the sequence of removal and
installation of a replacement filter. Failure to
observe these instructions will most probably
result in permanent damage to the flexible line,
resulting in unnecessary parts replacement and
expense.
Fuel Injectors
The director plate top-feed fuel injectors are
controlled by the PCM, and meter pressurised fuel
to a single engine cylinder. The PCM energises the
injector solenoid, which opens a ball valve,
allowing fuel to flow past the ball valve, and
through a recessed flow director plate.
The director plate has multiple machine holes that
control the fuel flow, generating a conical spray
pattern of finely atomised fuel at the injector tip.
Fuel is directed at the intake valve, causing it to
become further atomised and vaporised before
entering the combustion chamber.
GEN III V8 ENGINE MANAGEMENT Page - 91