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Home >> Cadillac >> 2004 >> CTS Base, 3.6 7 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 6 (Engine Controls - 2.6L & 3.2L - Introduction) >> Description and Operation >> Fuel System Description >> Fuel Rail

Fuel Rail

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Fig 1: View Of Fuel Rail & Fuel Supply/Return Lines
GM61654Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 The Fuel Rail
2 The Fuel Supply Line
3 The Fuel Return Line
4 The Fuel Pressure Regulator

The fuel rail consists of 4 parts:

The fuel rail is mounted on the intake manifold and distributes the fuel to each cylinder through the individual injectors.

The fuel is delivered from the pump through the fuel feed line to the inlet port of the fuel rail pipe. From the fuel feed inlet, fuel is directed to the rail pipe to the fuel pressure regulator. Any fuel in excess of the injector needs will flow back through the pressure regulator assembly to the outlet port of the fuel rail. The fuel then flows through the fuel return line to the fuel tank to begin the cycle again.