Malibu V6-191 3.1L VIN M SFI (1997)
Fuel Rail: Description and Operation
GENERAL DESCRIPTION
The fuel rail assembly is made up of the left hand rail (5), which delivers fuel to the even cylinders (2, 4, 6); the right hand rail (1), which delivers
fuel to the odd cylinders (1, 3, 5); the fuel injectors (4); and the fuel pressure regulator assembly (3). The rail assembly is mounted to the lower
section of the intake manifold and distributes fuel to the cylinders through the individual injectors.
Fuel is delivered from the pump through the fuel feed pipe to the inlet fitting (2) on the fuel rail. Fuel then flows through the fuel rail to the fuel
pressure regulator. The fuel pressure regulator maintains constant fuel pressure at the fuel injectors. Remaining fuel then flows through the fuel
return pipe back to the tank.
