GM Cadillac Deville_Fleetwood_ELD_Seville 1990-1998

Fuel Filter

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CAUTION
Observe all applicable safety precautions when working around fuel. Whenever servicing the fuel system, always work in a well ventilated area. Do not allow fuel spray or vapors to be exposed to a spark or open flame. Keep a dry chemical fire extinguisher near the work area. Always keep fuel in a container specifically designed for fuel storage; also, always properly seal fuel containers to avoid the possibility of fire or explosion.

The purpose of the in-line fuel filter is to provide filtration to protect the small metering orifices of the injector nozzles. The filter is located downstream of the electric fuel pump and is mounted on the underbody. The fuel filter is a one-piece construction that cannot be cleaned. If it becomes clogged, it must be replaced.

REMOVAL & INSTALLATION




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


WARNING
Fuel supply lines on all vehicles equipped with fuel injected engines will remain pressurized for long periods after engine shutdown. The pressure must be relieved before servicing these fuel systems.

  1. Disconnect the negative battery cable.
  2.  
  3. Depressurize the fuel system.
  4.  
  5. Remove the filter bracket retainer.
  6.  
  7. For plastic type fittings:
    1. Grasp the filter and one fuel line fitting. Twist the quick connect fitting 1 / 4 turn in each direction to loosen any dirt within the fitting. Repeat for the other fuel line fitting.
    2.  
    3. Squeeze the plastic retainer release tabs and pull the connection apart. Repeat for the other fitting.
    4.  

  8.  
  9. For metal type fittings:
    1. Use a fuel pipe quick-connect separator J37088 or equivalent. This is available from your local parts store.
    2.  
    3. Insert the tool into the female side of the connector, then push inward to release locking tabs. Pull the connection apart.
    4.  

  10.  



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Fig. There are a couple of fasteners that need to be removed to access the filter. This is one of them



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Fig. Some models utilize a plastic fitting on the fuel filter



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Fig. Twist the fuel line back and forth while holding the filter still.This will loosen any dirt caught in the connection



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Fig. Squeeze the tabs on the plastic line to free them from the lock



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Fig. Slide the hose off the front end of the filter first. It's easier to work with



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Fig. Remove the other fitting in the same manner



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Fig. After removing the fuel line from the other side, you can now slide it out of the sleeve and remove it from the vehicle



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Fig. The filter is typically attached to this bracket



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Fig. Remove the filter from this bracket before installing the new filter

To install:

  1. Remove the protective caps from the new filter and apply a few drops of clean engine oil to both tube ends of the filter and O-rings. Install the fuel filter so that the flow arrow follows the direction of fuel flow.
  2.  
  3. Install the new plastic connector retainers onto the filter inlet and outlet tubes (plastic collar type fittings).
  4.  
  5. Push the connectors together to cause the retaining tabs to snap into place. Once installed pull on both ends of each connection to make sure they are secure.
  6.  
  7. Before installing the fitting on the filter, wipe the filter end with a clean cloth. Inspect the inside of the fitting to make sure it is free of dirt and/or obstructions
  8.  
  9. Align the fitting, and filter axially and push the fitting onto the filter end. Pull on the fitting to make sure it is fully engaged.
  10.  
  11. Install the fuel filter and bracket on the frame.
  12.  
  13. Connect the negative battery cable.
  14.  
  15. Start the engine and check for leaks.
  16.  

 
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