Seville STS V8-4.6L VIN 9 (1998)
Fuel Rail: Description and Operation
Fuel Rail Assembly
The fuel rail consists of five parts:
^
The pipe that carries fuel to each injector.
^
The fuel pressure regulator.
^
The fuel pressure test port.
^
The fuel rail ground strap.
^
Eight individual fuel injectors.
The fuel rail is mounted on the intake manifold and distributes fuel to each cylinder through the individual injectors.
Fuel is delivered from the pump through the fuel feed pipe to the inlet port of the fuel rail pipe. From the fuel feed inlet, fuel is directed to the front rail
pipe, then a crossover to the rear pipe, then through the rear rail pipe to the fuel pressure regulator. Fuel in excess of injector needs flows back through
the pressure regulator assembly to the outlet port of the fuel rail. Fuel then flows through the fuel return pipe to the fuel tank to begin the cycle again.
A eight digit identification number is stamped on the fuel rail assembly. The model identification contains the Julian date, the year, and the shift. Refer to
this model identification number if servicing or part replacement is required.
