Buick Regal 1997-2000

Removal & Installation

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Your GM W-Body vehicle is equipped with Quick-Connect fuel lines. Quick-connect type fittings provide a simplified means of installing and connecting fuel system components. These fittings require some care when handling. Remember that the Sequential Fuel Injection (SFI) system used on these vehicles is a high-pressure system. Normal operating pressure averages around 45 psi, much the same as the water pressure in an average house. Gasoline under pressure like this requires sound, leak-proof fittings to avoid leaks, creating a fire hazard.

Depending on the vehicle model and the system components being connected, there are two types of quick-connect fittings: plastic and metal. Each is used at different locations in the fuel system. Each type of quick-connect fitting consists of a unique female connector and a compatible male fuel pipe end. O-rings, located inside the female connector, provide the fuel seal. Integral locking tabs, or fingers, hold the quick-connect fitting together.


CAUTION
To reduce the risk of fire and personal injury, it is necessary to relieve the fuel system pressure before servicing any fuel system component. If this procedure is not performed, fuel may be sprayed out of the connection under pressure. Cover the fuel hose connections with a shop cloth before disconnecting to catch any residual fuel that may still be in the line. Always keep a dry chemical (Class B) fire extinguisher near the work area.

Metal Fittings




NOTE
This procedure requires a special tool, GM J37088, or equivalent, to release the locking tabs.

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the engine cosmetic/acoustic cover (called the Fuel Injection Sight Shield).
  4.  
  5. Relieve the fuel system pressure using the procedures listed later in this section.
  6.  
  7. Grasp both sides of the quick-connect fitting. Twist the quick-connect fitting 1 / 4 turn in each direction to loosen any dirt within the fitting.
  8.  
  9. Repeat for other fuel pipe fitting.
  10.  
  11. Using shop compressed air, blow out dirt from the quick-connect fittings at both ends.
  12.  
  13. Using special tool J 37088, or equivalent Fuel Line Fitting Service Tool, insert the end of the tool into the female connector, then push forward to release the locking tabs.
  14.  
  15. Pull the connection apart. Repeat for the fitting at the other end of the line, if necessary.
  16.  
  17. Wipe off the male pipe end using a clean shop towel. If it is necessary to remove rust or burrs from a fuel pipe, use fine emery cloth in a radial motion with the fuel pipe to prevent damage to the O-ring sealing surface.
  18.  
  19. Inspect and replace components/assemblies as required.
  20.  

To assemble:


CAUTION
To reduce the risk of fire and personal injury, before connecting fuel pipe fittings, always apply a few drops of clean engine oil to the make pipe ends. This will ensure proper reconnection and prevent a possible fuel leak. During normal operation, the O-rings located in the female connector will swell and may prevent proper reconnection if not lubricated.

  1. Apply a few drops of clean engine oil to the male pipe end.
  2.  
  3. Push both sides of the quick-connect fitting together causing the retaining tabs/fingers to snap into place.
  4.  
  5. Pull on both sides of the quick-connect fitting to verify the connection is secure.
  6.  
  7. Connect the negative battery cable.
  8.  
  9. Check for leaks using the following procedure:
    1. Turn the ignition switch to the ON position for 2 seconds, pressurizing the fuel system.
    2.  
    3. Turn the ignition switch to the OFF position for 10 seconds.
    4.  
    5. Turn the ignition switch to the ON position.
    6.  
    7. Inspect the connection for leaks.
    8.  

  10.  
  11. Install the engine cosmetic/acoustic cover.
  12.  

Plastic Retainer Ring Type





Click image to see an enlarged view

Fig. Two types of fittings are used: metal and plastic. Use care when servicing fittings to maintain system integrity on these high-pressure fuel injection systems

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the engine cosmetic/acoustic cover (also called the fuel injection sight shield).
  4.  
  5. Relieve the fuel system pressure using the procedures listed later in this section.
  6.  
  7. Grasp both sides of the quick-connect fitting. Twist the quick-connect fitting 1 / 4 turn in each direction to loosen any dirt within the fitting.
  8.  
  9. Repeat for other fuel pipe fitting.
  10.  
  11. Using compressed air, blow out dirt from the quick-connect fittings at both ends.
  12.  
  13. Squeeze the plastic tabs of the male end connector.
  14.  
  15. Pull the connection apart. Repeat for the fitting at the other end of the line, if necessary.
  16.  
  17. Wipe off the male pipe end using a clean shop towel.
  18.  
  19. Inspect and replace components/assemblies as required.
  20.  

To assemble:


CAUTION
To reduce the risk of fire and personal injury, before connecting fuel pipe fittings, always apply a few drops of clean engine oil to the male pipe ends. This will ensure proper reconnection and prevent a possible fuel leak. During normal operation, the O-rings located in the female connector will swell and may prevent proper reconnection if not lubricated.

  1. Apply a few drops of clean engine oil to the male pipe end.
  2.  
  3. Push both sides of the quick-connect fitting together causing the retaining tabs/fingers to snap into place.
  4.  
  5. Pull on both sides of the quick-connect fitting to verify the connection is secure.
  6.  
  7. Connect the negative battery cable.
  8.  
  9. Check for leaks using the following procedure:
    1. Turn the ignition switch to the ON position for 2 seconds, pressurizing the fuel system.
    2.  
    3. Turn the ignition switch to the OFF position for 10 seconds.
    4.  
    5. Turn the ignition switch to the ON position.
    6.  
    7. Inspect the connection for leaks.
    8.  

  10.  
  11. Install the engine cosmetic/acoustic cover (fuel injector sight shield).
  12.  

 
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