Maxima 2007

Fuel Rail (Supply Manifold) & Injectors


Removal & Installation

  1. Before servicing the vehicle, refer to the Precautions Section.
  3. Relieve the fuel system pressure.
  5. Remove or disconnect the following:

    Negative battery cable
    Intake manifold collector
    Vacuum hose from the pressure regulator
    Fuel hoses from the rail
    Injector electrical connectors
    Fuel rail bolts

  7. To remove the fuel injector from the fuel rail, expand and remove the clips securing the injectors and press the fuel injector out from the fuel rail. Discard the O-rings.

To install:

  1. Apply a thin coat of engine oil to the new O-rings, install them on the injectors, then press the injector into the fuel rail.
  3. Install or connect the following:

    New injector retaining clips
    New injector gaskets onto the manifold
    Fuel rail assembly to the engine
    Fuel rail-to-cylinder head bolts and torque the bolts to 84-96 inch lbs. (9.3-10.8 Nm). Then tighten them again to 16-19 ft. lbs. (21-26 Nm).
    Fuel lines to the rail assembly
    Vacuum hose to the fuel pressure regulator
    Electrical connectors to the fuel injectors
    Intake manifold collector
    Negative battery cable

  5. Start the engine and check for leaks.