Question about 1998 Cadillac DeVille

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Why can't I see what the amount of fuel is in the tank on my 1998 deville

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Fuel level sensor in tank worn out

Posted on Jun 27, 2009

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99 cadillac deVille ran out of gas now it wont start


Its possible you cooked the pump. The pump needs liquid gasoline to keep it cool and lubed. There's also a chance the pump is damaged from debris from the bottom of the tank.
If you have fuel in the tank, you would jumper the pump relay to find out if the pump is running and what is coming out of the filter under the car.

Aug 11, 2013 | 1998 Cadillac DeVille

1 Answer

Gas gauge does not work


unfortunatley the sending unit is in the fuel tank where if faulty it would have to be replaced you can check it by dropping the tank at the two smaller wires test the resistance in them with no fuel in the tank the resistance should only read around +- 5 also there is a plug just in front of the tank where the pump assembly plugs into you can check resistance there instead of dropping tank

Apr 05, 2013 | 1998 Cadillac DeVille

1 Answer

98 deville will not take no more than 2 gallons of gas.


It sounds like your vent hose is plugged or your feed hose is kinked either way the tank will need removed to inspect

Sep 18, 2012 | 1998 Cadillac DeVille

1 Answer

Install new fuel pump and sending unit 6 mo. ago. I am receiving faust reading on amount of gas in tank. gause read empty but tank has 8 gal. What is the problem


The sending unit that is located on the fuel pump is faulty or it may be wrong pump or something got bent installing it.

Apr 10, 2012 | 1997 Cadillac DeVille

1 Answer

Location of and how to remove and replace - 2002 DeVille Sending Unit/Fuel Pump Module (4.6L engine)


These units are in the tank and must be dropped in order to replace.


WARNING Do not handle the fuel sender assembly by the fuel pipes. The amount of leverage generated by handling the fuel pipes could damage the joints.

  1. Relieve the fuel system fuel pressure, as outlined in the Fuel System Section.
  2. Drain the fuel tank to at most 3/4 of a tank full.
  3. Raise the vehicle.
  4. Remove the fuel tank.
    NOTE The modular fuel sender support assembly will spring-up when the locking ring is moved.
  5. Remove the fuel sender assembly using tool J39765 Fuel Sender Locknut Wrench or an equivalent.
  6. Note the position of the fuel sender strainer for installation.
  7. Support the reservoir with one hand and grasp the fuel sender strainer with the other hand.
  8. Pull the external fuel sender strainer off of the fuel sender.
  9. Inspect the fuel sender strainer. If the fuel sender strainer is contaminated, the fuel tank should be cleaned.
  10. Discard the fuel sender strainer after inspection.
  11. Disassemble the electrical connectors from the fuel level sensor assembly of the fuel pump and cover assembly.
  12. Disassemble the fuel level sensor assembly.

    0996b43f802054cc.jpg enlarge_icon.gifenlarge_tooltip.gif

    Fig. Fuel level sending unit on fuel sender (fuel pump) module.


To install:
  1. Assemble the fuel level sensor assembly.
  2. Assemble the electrical connectors to the fuel pump and cover assembly.
  3. Position the new fuel sender strainer on the modular fuel sender and push on the outer edge of the fuel sender strainer until the fuel sender strainer is fully seated on to the sender assembly.
  4. Install the fuel sender assembly into the fuel tank using tool J39765 Fuel Sender Locknut Wrench or an equivalent.
  5. Reinstall the fuel tank.
  6. Lower the vehicle.
  7. Add fuel to the fuel tank.
  8. Connect the negative battery cable.
  9. Reinstall the fuel tank filler pipe cap.
  10. Inspect for fuel leaks.
  11. Turn the ignition switch ON for 2 seconds.
  12. Turn the ignition switch OFF for 5 seconds.
  13. Turn the ignition switch ON .
  14. Check for fuel leaks.

Oct 26, 2010 | 2002 Cadillac Deville

1 Answer

Where is the fuel pump?


the fuel pump is located inside of the gas tank, to repair/replacr it disconnect all lines and electrical connectors, remove exhaust system and lower gas tank remove ring on top of tank after you disconnect the fuel lines and electrical connectors pull it up and turn it some so you dont destory the fuel level sender

Aug 22, 2010 | 1998 Cadillac DeVille

1 Answer

The gas gage on my 2002 deville does not register correctly. I never know how much gas I have. What are the problem areas to consider?


The problem is either a faulty fuel sending unit located inside of the fuel tank, the wiring between the fuel sending unit and the fuel gauge, or the fuel gauge itself is malfunctioning.

A good repair shop can find out for you which one is at fault by dis-connecting the wiring connector to the fuel sending unit and then use an adjustable ohms box to simulate the fuel sending unit, and the fuel gauge should read at a certain level of fuel according to the amount of ohms being put through the wire.

Jun 02, 2010 | 2002 Cadillac Deville

1 Answer

1998 cadillac deveville


yes it could and if there is little gas in the tank then gas might not be getting to the fuel pump

Nov 09, 2008 | 1998 Cadillac DeVille

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