GM Corsica/Beretta 1988-1996 Repair Guide

Fuel Pressure Regulator

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REMOVAL & INSTALLATION



See Figure 1


WARNING
To prevent leaks, the pressure regulator diaphragm assembly must be replaced whenever the cover is removed.

  1. Properly relieve the fuel system pressure.
  2.  
  3. If not done already, disconnect the negative battery cable.
  4.  
  5. Remove the TBI cover and gasket.
  6.  
  7. Remove the 4 pressure regulator attaching screws, while keeping the pressure regulator compressed.
  8.  


CAUTION
The pressure regulator contains a large spring under heavy compression. Use care when removing the screws to prevent personal injury.

  1. Remove the pressure regulator cover assembly, then remove the spring seat.
  2.  
  3. Remove the pressure regulator diaphragm assembly.
  4.  
  5. Install the pressure regulator diaphragm assembly, making sure it is seated in the groove in the fuel meter body.
  6.  



Click image to see an enlarged view

Fig. Fig. 1: Exploded view of the fuel pressure regulator assembly

To install:
  1. Install the regulator spring seat and spring into the cover assembly.
  2.  
  3. Install the cover assembly over the diaphragm, while aligning the mounting holes.
  4.  
  5. While maintaining pressure on the regulator spring, install the 4 screw assemblies that have been coated with appropriate thread locking compound. Tighten the screws to 22 inch lbs. (2.4 Nm).
  6.  
  7. Connect the negative battery cable. With the engine OFF and the ignition in the ON position, check for fuel leaks.
  8.  
  9. Install the TBI cover, using a new gasket.
  10.  

 
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