Lumina V6-3.1L VIN J (2000)
Fuel Rail: Description and Operation
The fuel rail assembly is made up of two rails, the left hand rail, delivers fuel to the even cylinders (2,4,6) and the right hand rail delivers fuel to the odd
cylinders (1,3,5). The fuel injectors and the fuel pressure regulator assembly, which is mounted to the rear of the intake manifold, distributes fuel to the
cylinders through the individual injectors.
Fuel is delivered to the fuel inlet tube of the fuel rail by the fuel pipes. The fuel then goes through the fuel rail to the fuel pressure regulator. The fuel
pressure regulator maintains a constant fuel pressure at the fuel injectors. Remaining fuel is then returned to the fuel tank.