Cavalier, Sunfire 2001-2005

Multi-Port Fuel Injection System (MFI)

Print

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 resonator
     
    Fuel feed and return lines
     
    Camshaft Position (CMP) sensor electrical connector
     
    Fuel injector electrical connectors
     
    Vacuum hose from the fuel pressure regulator
     
    Fuel rail
     
    Fuel pressure regulator from the fuel rail, twist it back and forth
     
    Fuel injector-to-fuel rail retaining clip
     
    Fuel injector

    Click image to see an enlarged view

    Fig. Exploded view of the fuel rail assembly-2.4L engine



    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(s) with new O-rings
     
    Fuel rail. Torque the bolts to 18 ft. lbs. (24 Nm).
     
    Fuel pressure regulator with a new O-ring to the fuel rail. Torque the bolt to 53 inch lbs. (6 Nm).
     
    Fuel feed and return lines
     
    Fuel injector electrical connectors
     
    Vacuum hose to the fuel pressure regulator
     
    CMP sensor electrical connector
     
    Air cleaner resonator
     
    Negative battery cable
     

  4.  
  5. Pressurize the fuel system.
  6.  
  7. Inspect for fuel leaks using the following procedure:


    1. Turn ON the ignition, with the engine OFF for 2 seconds.
    2.  
    3. Turn OFF the ignition for 10 seconds.
    4.  
    5. Turn OFF the ignition.
    6.  
    7. Inspect for fuel leaks.
    8.  

  8.  

 
label.common.footer.alt.autozoneLogo