GM Firebird 1982-1992 Repair Guide

Fuel Pressure Regulator

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REMOVAL & INSTALLATION



2.8L and 3.1L Engines

The pressure regulator and the fuel rail are serviced as a complete assembly only. DO NOT attempt to remove the regulator cover from the fuel rail.

3.8L Turbo Engines
  1. Disconnect the negative battery cable.
  2.  
  3. Relieve the fuel system pressure.
  4.  
  5. Remove the pressure regulator attaching bolts/screws.
  6.  
  7. Separate the pressure regulator from the fuel rail. Discard the O-ring seal.
  8.  

To install:
  1. Lubricate the new O-ring seal with clean engine oil and install.
  2.  
  3. Install the pressure regulator assembly.
  4.  
  5. Connect the negative battery cable.
  6.  
  7. With the engine OFF and the ignition ON, check for fuel leaks.
  8.  

5.0L and 5.7L TPI Engines

  1. Disconnect the negative battery cable.
  2.  
  3. Relieve the fuel system pressure.
  4.  
  5. Remove the intake plenum and runners.
  6.  
  7. Remove the fuel rail assembly.
  8.  
  9. Remove the rear crossover retainer and base attaching screw.
  10.  
  11. Remove the rear crossover tube and O-ring from the regulator base. Discard the O-ring.
  12.  
  13. Remove the pressure regulator bracket.
  14.  
  15. Remove the pressure regulator base-to-rail screw.
  16.  
  17. Separate the regulator base from the fuel rail, then disconnect from the fuel outlet tube.
  18.  
  19. Remove the fuel outlet tube O-ring and discard.
  20.  
  21. Remove the regulator base-to-fuel rail connector.
  22.  

To install:
  1. Lubricate and install new regulator base-to-fuel rail O-rings.
  2.  
  3. Lubricate a new outlet tube 0-ring and install it on the end of the tube.
  4.  
  5. Connect the regulator base to the fuel outlet tube, then to the fuel rail.
  6.  
  7. Finger-tighten the base-to-rail screw.
  8.  
  9. Install the pressure regulator bracket. Finger-tighten the screws only.
  10.  
  11. Lubricate a new rear crossover tube O-ring and install it on the end of the tube.
  12.  
  13. Install the rear crossover tube to the regulator base.
  14.  
  15. Install the crossover tube retainer and finger-tighten the screw.
  16.  
  17. Tighten all attaching screws to 44 inch lbs. (5 Nm).
  18.  
  19. Install the fuel rail assembly.
  20.  
  21. Temporarily connect the negative battery cable.
    1. With the engine OFF and the ignition ON, check for fuel leaks.
    2.  
    3. Disconnect the negative battery cable.
    4.  

  22.  
  23. Install the intake plenum and runners.
  24.  
  25. Connect the negative battery cable.
  26.  

 
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