GM Corsica/Beretta 1988-1996 Repair Guide

Relieving Fuel System Pressure

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CAUTION
To reduce the risk of fire or personal injury, it is necessary to relieve the fuel system pressure before servicing the fuel system.

1990 2.3L & 1988-94 2.8L & 3.1L ENGINES



  1. Disconnect the negative battery cable, to prevent fuel spray if someone accidentally tries to start the engine.
  2.  
  3. Loosen the fuel filler cap to relieve tank vapor pressure.
  4.  
  5. Connect a J-34730-1 fuel gauge or equivalent, to the fuel pressure valve. Wrap a shop towel around the fitting while connecting the gauge to avoid spillage.
  6.  
  7. Install a bleed hose into an approved container and open the valve to bleed the system pressure. The fuel system is now safe for servicing.
  8.  
  9. Drain any remaining fuel in the gauge into an approved container.
  10.  

1991-94 2.3L & 1995-96 3.1L ENGINES



  1. Loosen the full filler cap to relieve the tank vapor pressure. Leave the cap loose at this time.
  2.  
  3. Raise and support the vehicle safely.
  4.  
  5. Detach the fuel pump electrical connector.
  6.  
  7. Carefully lower the vehicle.
  8.  
  9. Start the engine and run until the fuel supply remaining in the fuel pipes is consumed. Engage the starter for 3 seconds to assure relief of any remaining pressure.
  10.  
  11. Raise and support the vehicle safely.
  12.  
  13. Attach the fuel pump electrical connector.
  14.  
  15. Carefully lower the vehicle.
  16.  
  17. Tighten the fuel filler cap.
  18.  
  19. Disconnect the negative battery cable terminal to avoid possible fuel spray if someone accidentally tries to start the engine.
  20.  

 
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