179
FUEL SYSTEM
COMPONENTS
7
Pressure Regulator
The fuel pressure regulator helps maintain consis-
tent fuel pressure in the fuel system.
Fuel returning from the injectors enters the fuel
chamber of the vapor separator through a pres-
sure regulator. The pressure regulator maintains
approximately 20 to 30 psi (138 to 207 kPa) of fuel
pressure in the high pressure side of the fuel sys-
tem.
Fuel Circulation Pump
The fuel circulation pump is an electric high pres-
sure fuel pump. The pump is controlled by the
EMM.
Fuel Supply
The pump is mounted to the vapor separator and
draws fuel from the fuel chamber. The fuel injec-
tors receive pressurized fuel from a fuel supply
manifold connected directly to the circulation
pump.
Electrical Circuit
Activation of the circulation pump is controlled by
the EMM and operates on the 12 V circuit. The cir-
culation pump is activated momentarily when the
EMM powers up.
Fuel Manifolds
The fuel supply and return manifolds route fuel
through the high pressure side of the fuel system.
Fuel Supply Manifold
The fuel supply manifold supplies pressurized fuel
to the inlet port of each fuel injector.
Fuel Return Manifold
The fuel return manifold provides a route for fuel
passing through the fuel injectors to flow back to
the fuel chamber of the vapor separator.
1. Fuel pump electrical connector 005327
1
1. Fuel supply manifold
2. Fuel return manifold
005328
1. Inlet ports
2. Return ports
005332
2
1
2
1
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