Alero, Grand Am 1999-2005

Multi-Port Fuel Injection System (MFI)

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Fuel Rail (Supply Manifold) & Injectors



Removal & Installation
2.4L Engine
  1. Before servicing the vehicle, refer to the precautions section.
  2.  
  3. Relieve the fuel system pressure.
  4.  
  5. Remove or disconnect the following:

    Air cleaner outlet resonator
     
    Fuel pressure regulator vacuum hose
     
    Camshaft Position (CMP) sensor electrical connector
     
    Fuel injector electrical connectors
     
    Fuel inlet pipe at the fuel rail
     
    Fuel return pipe bracket screw and separate the fuel pipe from the pressure regulator
     
    Fuel rail assembly
     
    Fuel injector retaining clip
     
    Fuel injector

    Click image to see an enlarged view

    Fig. Exploded view of the fuel injector-2.4L engine

     

  6.  

To install:

  1. Lubricate the O-rings with engine oil prior to installation.
  2.  
  3. Install or connect the following:

    Fuel injector with new O-rings
     
    Fuel injector retaining clip
     
    Fuel rail assembly. Torque the bolts to 19 ft. lbs. (26 Nm).
     
    New fuel pipe O-rings lubricated with engine oil
     
    Fuel inlet pipe. Torque the fitting to 22 ft. lbs. (30 Nm).
     
    Fuel return pipe to the pressure regulator. Torque the screw to 53 inch lbs. (6 Nm).
     
    Fuel injector electrical connectors
     
    CMP sensor electrical connector
     
    Fuel pressure regulator vacuum hose
     
    Air cleaner outlet resonator
     
    Negative battery cable
     

  4.  
  5. Re-pressurize the fuel system and check for leaks.
  6.  

 
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