GM Lumina/Grand Prix/Cutlass Supreme/Regal 1988-1996

Relieving Fuel System Pressure

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PROCEDURE



2.2L Engine
  1. Loosen or remove the fuel filler cap to relieve fuel tank vapor pressure (do not tighten at this time).
  2.  
  3. Raise and safely support the vehicle.
  4.  
  5. From under the vehicle, detach the fuel pump electrical connector. It should be the only connector coming from the fuel tank.
  6.  
  7. Carefully lower the vehicle.
  8.  
  9. Start the engine and run until the fuel supply remaining in the fuel pipes is consumed (until the engine stalls). Crank the starter for an additional 3 seconds to assure relief of any remaining pressure.
  10.  
  11. Raise and safely support the vehicle, then attach the fuel pump electrical connector. Carefully lower the vehicle.
  12.  
  13. Install or tighten the fuel filler cap.
  14.  
  15. Disconnect the negative battery cable, to avoid possible fuel discharge if an accidental attempt is made to start the engine.
  16.  

Except 2.2L Engine
  1. Disconnect the negative battery cable to avoid possible fuel discharge if an accidental attempt is made to start the engine.
  2.  
  3. Loosen the fuel filler cap to relieve fuel tank vapor pressure.
  4.  
  5. Connect fuel pressure valve J 34730-1 or equivalent to the fuel pressure relief connection at the fuel rail.
  6.  
  7. Wrap a shop towel around the fittings while connecting the tool to prevent fuel spillage.
  8.  
  9. Install a bleed hose into an approved container and open the valve to bleed the system pressure.
  10.  
  11. Install the fuel filler cap.
  12.  

 
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