DeVille, Eldorado, Seville 1999-2005

Fuel Rail (Supply Manifold) & Injectors

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Removal & Installation



  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Relieve the fuel system pressure.
  4.  
  5. Remove or disconnect the following:

    Intake manifold cover
     
    Intake Air Temperature (IAT) sensor electrical connector
     
    Mass Airflow (MAF) sensor electrical connector
     
    Air cleaner intake duct
     
    Quick-connect fittings from the fuel rail
     
    Fuel pressure regulator vacuum hose
     
    Positive Crankcase Ventilation (PCV) air tube
     
    Fuel rail end-point bracket retainer nut
     
    Fuel injector electrical connectors
     
    Fuel rail attaching bolts
     
    Fuel injectors from the intake manifold with injector removal tool J43013
     
    Fuel rail
     
    Injector from the rail and discard the O-rings
     

  6.  

To install:


NOTE
Each fuel injector is calibrated for a specific flow rate. Be sure to use the correct part number when ordering replacement fuel injectors.

  1. Install or connect the following:

    New O-rings lubricated with clean engine oil
     
    Fuel injector into the fuel rail
     
    Fuel rail into the intake manifold and tighten the attaching bolts to 89 inch lbs. (10 Nm)
     
    Fuel injector electrical connectors
     
    Fuel rail end-point bracket retainer nut and tighten to 89 inch lbs. (10 Nm)
     
    PCV air tube
     
    Fuel pressure regulator vacuum hose
     
    Quick-connect fittings from the fuel rail
     
    Air cleaner intake duct
     
    MAF sensor electrical connector
     
    IAT sensor electrical connector
     
    Negative battery cable
     

  2.  
  3. Inspect for fuel leaks as follows:
    1. Step 1: Turn ignition switch to the ON position for 2 seconds.
    2.  
    3. Step 2: Turn ignition switch OFF for 10 seconds.
    4.  
    5. Step 3: Turn ignition switch ON .
    6.  
    7. Step 4: Check for leaks.
    8.  

  4.  
  5. Install the intake manifold cover. Torque the nuts to 27 inch lbs. (3 Nm).
  6.  

 
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