GM Corsica/Beretta 1988-1996 Repair Guide

Fuel Filter

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REMOVAL & INSTALLATION




CAUTION
Never smoke when working around gasoline! Avoid all sources of sparks or ignition. Gasoline vapors are EXTREMELY volatile!

An in-line fuel filter can be found in the fuel feed line attached to the rear crossmember of the vehicle, rear of the fuel tank. There is no service interval for replacing the fuel filter. Only replace the filter if it becomes clogged or restricted.

388-89 Vehicles

See Figure 1

  1. Relieve the fuel system pressure. For details regarding this procedure, please refer to Fuel System of this informtion.
  2.  
  3. If not already done, disconnect the negative battery cable.
  4.  
  5. Raise and safely support the vehicle.
  6.  
  7. Clean both fuel feed pipe connections and the surrounding areas at the in-line fuel filter with a clean rag to avoid possible contamination of the fuel system.
  8.  


WARNING
When removing the fuel filter, always use a back-up wrench to disconnect the fuel lines.

  1. Using a back-up wrench, remove the fuel line fittings from the fuel filter.
  2.  
  3. Remove the fuel filter mounting screws, then slide the fuel filter out of the mounting bracket.
  4.  



Click image to see an enlarged view

Fig. Fig. 1: Fuel filter mounting and line attachments - 1988-89 vehicles

  1. Remove and discard the fuel line O-rings and replace with new ones during installation.
  2.  

To install:
  1. Install new O-rings to the fuel line fittings.
  2.  

The fuel filter has an arrow indicating fuel flow direction on the side of the case, so be sure to install it correctly in the system, the with arrow facing away from the fuel tank.

  1. Connect the fuel lines to the filter.
  2.  
  3. Position the fuel filter in the mounting bracket, in the same position it was originally. Tighten the fuel line fittings to 22 ft. lbs. (30 Nm) using a back-up wrench to avoid twisting the lines.
  4.  
  5. Install the fuel filter mounting bracket screws/bolts and tighten securely.
  6.  
  7. Carefully lower the vehicle. Install or tighten the fuel filler cap.
  8.  
  9. Connnect the negative battery cable, then start the engine and check for leaks.
  10.  

390-96 Vehicles

See Figures 2 and 3

If your vehicle is equipped with the 3.1L (VIN T) engine, anytime the battery is disconnected, the programmed position of the Idle Air Control (IAC) valve pintle is lost and replaced with a "default" value. The IAC valve pintle can be returned to the proper position by performing an Idle Learn Procedure, which requires the use of a Tech 1® or equivalent scan tool.

  1. Relieve the fuel system pressure. For details regarding this procedure, please refer to Fuel System of this information.
  2.  
  3. If not already done, disconnect the negative battery cable.
  4.  
  5. Raise and safely support the vehicle.
  6.  
  7. Clean both fuel feed pipe connections and the surrounding areas at the in-line fuel filter with a clean rag to avoid possible contamination of the fuel system.
  8.  


WARNING
When removing the fuel filter, always use a back-up wrench to disconnect the fuel lines.

  1. Using a back-up wrench, remove the fuel line fittings from the fuel filter.
  2.  
  3. Remove the filter attaching screw and filter.
  4.  

Kinked nylon fuel feed or return lines cannot be straightened and must be replaced.

  1. Grasp the filter and one nylon fuel connecting line fitting. Twist the quick connect fitting 1 / 4 turn in each direction to loosen any dirt within the fitting. Repeat for the other nylon fuel connecting line fitting.
  2.  
  3. Disconnect the quick connect fittings by squeezing the plastic tabs of the male end connector and pulling the connection apart. Repeat for the other fitting and remove the fuel filter.
  4.  



Click image to see an enlarged view

Fig. Fig. 2: Exploded view of the fuel filter mounting - 1990-92 vehicles



Click image to see an enlarged view

Fig. Fig. 3: Installed position of the fuel filter and lines - 393-96 vehicles

To install:
  1. Remove the protective caps from the ends of the new filter.
  2.  
  3. Install the new plastic connector retainers on the filter inlet and outlet tubes.
  4.  
  5. Apply a few drops of clean engine oil to both tube ends of the filter and O-rings.
  6.  
  7. Push the connectors together to cause the retaining the retaining tabs/fingers to snap into place. Pull on both ends of each connection to make sure they are secure.
  8.  
  9. Install a new O-ring on the fuel filter fitting and tighten to 4 ft. lbs. (27 Nm), using a back-up wrench to avoid twisting or warping the fuel lines..
  10.  
  11. Place the filter, in the same position as it was removed, to the frame with the attaching screw(s).
  12.  
  13. Carefully lower the vehicle.
  14.  
  15. Install or tighten the fuel filler cap, as necessary.
  16.  
  17. Connect the negative battery cable.
  18.  
  19. Turn the ignition switch to the ON position for 2 seconds, then turn to the OFF position for 10 seconds. Again turn the ignition switch to the ON position and check for leaks.
  20.  

For vehicles equipped with the 3.1L engine, the ECM will need to relearn the IAC pintle valve position following the reconnection of the battery.

  1. If equipped with the 3.1L engine, perform the idle learn procedure, as follows:
  2.  

 
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