Fuel Rails

The extruded fuel rail assembly includes a fuel pressure regulator, individual high pressure fuel injectors and cold start injector. The injectors fit into individual sockets in the base plate. The fuel rails used on 2.0L, 3.0L and 3.8L engines are manufactured, assembled and flow tested with the injectors as an assembly.

Fig 1: Typical In-Tank Roller Vane Fuel Pump

Courtesy of GENERAL MOTORS CORP.

Fig 2: Sectional View of Fuel Pressure Regulator

Courtesy of GENERAL MOTORS CORP.

Fig 3: Fuel Rails for 2.8L, 5.0L & 5.7L Engines

Courtesy of GENERAL MOTORS CORP.

The injectors are force fitted into the opening on the fuel rail. See Fig 3 . The injectors are locked in place with the aid of an injector retainer clip which must be rotated in the proper direction.