S10 Pickup, Sonoma 2000-2004

Fuel Pressure Regulator

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Removal & Installation



2.2L Engine
  1. Properly relieve the fuel system pressure.
  2.  
  3. Disconnect the negative battery cable.
  4.  
  5. Remove the pressure regulator vacuum hose.
  6.  
  7. Remove the pressure regulator attaching screw.
  8.  
  9. Remove the pressure regulator assembly and the O-ring. Discard the O-ring.

    Click image to see an enlarged view

    Fig. Fuel pressure regulator location on fuel rail assembly-2.2L engine

  10.  

To install:

  1. Lubricate the new pressure regulator O-ring (3) with clean engine oil, then install the O-rings on the pressure regulator.
  2.  
  3. Install the pressure regulator assembly (2) onto the fuel rail (4).
  4.  
  5. Install the pressure regulator attaching screw (1) coated with an appropriate thread-locking material. Tighten the pressure regulator attaching screw to 106 inch lbs. (12 Nm).
  6.  
  7. Connect the negative battery cable.
  8.  
  9. Inspect for fuel leaks.
  10.  
  11. Turn ON the ignition, with the engine OFF for 2 seconds.
  12.  
  13. Turn OFF the ignition for 10 seconds.
  14.  
  15. Turn ON the ignition, with the engine OFF.
  16.  
  17. Inspect for fuel leaks.
  18.  

4.3L Engines
  1. Properly relieve the fuel system pressure.
  2.  
  3. Disconnect the negative battery cable.
  4.  
  5. Remove the upper intake manifold.
  6.  
  7. Remove the fuel pressure regulator retainer clip.
  8.  
  9. Twist and pull the fuel pressure regulator in order to remove the regulator from the housing using a shop towel to catch any spilled fuel.
  10.  
  11. Remove and discard the regulator seal O-ring.
  12.  
  13. Remove and discard the regulator filter.
  14.  
  15. Remove and discard the regulator seal O-ring.
  16.  
  17. Remove and discard the backup ring.
  18.  
  19. Cover the fuel pressure regulator housing to prevent contamination from entering the fuel system.

    Click image to see an enlarged view

    Fig. Fuel pressure regulator assembly location (6)-4.3L engine

  20.  

To install:

  1. Lubricate the NEW O-rings seals with clean engine oil.
  2.  
  3. Assemble the following NEW parts to the fuel pressure regulator:

    Backup ring
     
    Regulator seal O-ring
     
    Regulator filter
     
    Regulator seal O-ring
     

  4.  
  5. Install the fuel pressure regulator with the vacuum tube pointing down.
  6.  
  7. Install the fuel pressure regulator retainer clip (5).
  8.  
  9. Install the upper manifold.
  10.  
  11. Tighten the fuel filler cap.
  12.  
  13. Connect the negative battery cable.
  14.  
  15. Inspect for leaks.
  16.  
  17. Turn the ignition switch ON for 2  seconds.
  18.  
  19. Turn the ignition switch OFF for 10 seconds.
  20.  
  21. Turn the ignition switch ON .
  22.  
  23. Inspect for fuel leaks.
  24.  

 
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