Engine distributors DSG-423 User Manual

DSG-423 FUEL SYSTEM
04-4
Operation
The fuel delivery system starts with the fuel in the tank.
Fuel is drawn up to the fuel pump through a pre-filter.
The electric fuel pump then delivers the fuel to the fuel
rail and injectors. The GCP controls the fuel pump to
deliver fuel pressure required by the injectors. The GCP
monitors system pressure through a fuel pressure
sensor.
Fuel is injected under pressure in a conical spray
pattern at the opening of the intake valve. There is a
return line to the tank with a small orifice to prevent
vapor lock in the pump
An actuator controls air supply to the intake manifold.
Governor settings are not adjustable. They can only be
programmed by authorized personnel only. Contact
your local EDI Distributor listed in the back of this
manual for further information.
CAUTION: Do not force the throttle plate open. This
may cause permanent damage to the actuator.
A pressure relief valve is located on the fuel rail. This is
used to read fuel pressure and also to relieve fuel
pressure prior to component replacement.
The GCP controls the amount of fuel/air delivery - refer
to Section 8 for further information on Electronic Engine
Control.
Fuel System Requirements
Fuel Tanks
The DOEM or OEM supplies the tanks. There must be
a fuel outlet and a fuel inlet. The gas cap must also be
vented.
Wet Fuels
The following fuels must all be unleaded and clean:
• Gasoline/petrol: This engine is designed to operate
on unleaded 87 or 89 octane gasoline.
• Gasohol/Ethanol: A mixture of gasoline and ethanol
(grain alcohol) containing up to 10% ethanol by
volume with properly formulated cosolvents and
other necessary additives. Blends index of 87 or 89.
• Gasohol/Methanol: A mixture of gasoline and
alcohol (wood alcohol, etc.) containing up to 5%
methanol by volume with properly formulated
cosolvents and other necessary additives. Blends
index of 87 or 89.
Fuel Pump
The fuel pump must be mounted on the frame rail, not
on the engine. It must also be mounted in packed foam.
CAUTION: The electric fuel pump MUST NOT be
mounted directly on the engine assembly, as en-
gine vibration will shorten the life of the pump.
Fuel Pressure
Fuel Filter
Fuel Pump
From
Tank
To
Return to
Tank
Sensor
Fuel
Injectors

Engine distributors DSG-423 Specifications

General

Brand	Engine distributors
Model	DSG-423
Category	Engine
Language	English