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Fuel gauge not giving a correct reading - 1998 Cadillac DeVille

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  • Cadillac Master
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If you do not want to replace the sending unit in the tank,you could install a variable resistor in series with the wire from the fuel sender unit and adjust it to reflect the proper level.

Posted on Jul 18, 2009

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Posted on Jan 02, 2017

shaggyrat
  • 1224 Answers

SOURCE: fuel gauge

there is a sending unit in the tank this has probably clogged or wore out it has a filter on it, with gas debries this will make your guages stop working correctly

replace sending unit by dropping tank with gas out of tank and then pull out sending unit replace with new one

Posted on May 21, 2008

  • 958 Answers

SOURCE: fuel gauge is not reading

to the right , i am assuming to the "full tank" reading. am i right?

if i am right, the wire from the gas tank is sending a full tank signal what ever the content of the tank.

meaning the wire is shorted to ground.
or the sending unit is faulty. there is a short to ground reading between the sending unit.

you can test which one is faulty. remove the wire from the sending unit. observe the gauge. if the gauge would go to " empty" then the culprit is the sending unit. if it stays on " full tank", then the wire is faulty.

WARNING: GASOLINE IS EXTREMELY FLAMMABLE. BE VERY CAREFUL IN HANDLING NEAR THEM.


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drcool

Posted on Sep 23, 2008

  • 1619 Answers

SOURCE: mercedes c180 fuel gauge giving mix reading

You can try to clean the ground behind the instrument cluster to see if that helps but most likely the sending unit has gone bad in the gas tank.

Posted on Aug 18, 2009

  • 9 Answers

SOURCE: 2001 Buick Lesabre - Fuel Gauge not showing correct reading.

sounds like you probably need a fuel level sender. it's located in the trunk on the right hand side attached to the fuel pump. I got one on ebay for about 20.00, but you might as well replace the fuel pump while you're at it, as it can go bad with time.

Posted on Aug 31, 2009

  • 58 Answers

SOURCE: '01 chevy venture fuel gauge doesnt read correctly reads all over

fuel sending unit located on the fuel pump in gas tank

Posted on Jan 13, 2010

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Just changed fuel pump on 2005 f250 4x4 and fuel gauge moves up tom 1/8 tank and reads low fuel on full tank, why is my fuel gauge not working correctly


The fuel sending unit rod was bent during the instalation giving you the false readings. This is the thin metal rod that attaches the float to the sender.

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If the signal from the sending unit is correct, the problem would be in the gauge on the dash.

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you fuel gauge is a sealed unit and cannot be fixed only replaced,but your problem may be your float in your fuel tank, it could have a crack or pin hole which is filling up the float so it sinks an doesn't rise to give you correct fuel reading

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Fuel gage showing half a tank but trip computer only registering 60 miles left


Its very simple. If the gauge is showing half full then fill the tank and see how much fuel it takes. If the amount you add is approximately 50 percent of the fuel tank capacity then you know the fuel gauge is accurate . In that case the computer is giving an inaccurate reading and should be ignored. All you need is an accurate fuel gauge - it does not matter a row of beans what the computer says if the fuel gauge is reading correctly.

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Why is gas gauge not working correctly since fuelpump was replaced.


Is this a flex fuel vehicle. If so, call the dealership and ask the parts dept. if there is a gauge module (perhaps behind the instrument cluster). This may be the culprit and needs to be replaced.

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Electronic gas gauge Gives wrong reading, after replacing fuel pump and floater.


instrument cluster is just for monitoring. but on modern cars there can be integrated circuits to calculate the actual amount of fuel inside tank. so sender sends signals and dashboard decodes it and show the amount on gauge.

which car do you have? if it is a later model with such system you may need to reset related software to match with new sender unit on pump or floater. (dealer can do this for you)

for example if you have a new daylight driving lights(LKM) controller on new BMW's if you replace it with a new one you need to code it to match with your car. if not it wont operate correctly.,

But there is an exeption. when sockets are broken or connections are wrong, fuel and temp gauges act erratic. they jump, pulsate or dont work at all. before replacing anything more be sure that sender unit or whole asembly is the correct part for your car. second be sure that connection has been done correctly.

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Gas gauge wont go past half it stops at half and will go to empty but never past half


There is a fuel gauge sensor in your fuel tank. If the sensor is out of place, it will not read the amount of gas in your tank correctly if it is out of place. This is a fixable job, but I recommend a ceritfied mechanic. Hope this helps! Please give 4 thumbs up!

Apr 18, 2011 | 2002 Jeep Liberty

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HI, MY FUEL GAUGE WORKS BUD ERRATIC, I MEAN IT DOESNT SHOW THE CORRECT AMOUNT OF GAS LEFT. WHAT COULD BE WRONG? THANKS.


In a case like this, the culpret is most likely the fuel level sending unit, which is located on the fuel pump in the fuel tank. In most vehicles, the pump and the sending unit all come in one assembly, which means in order to get a correct reading on the gauge, you'll need to replace the fuel pump. And actually, considering the fact that you have to drop the fuel tank and remove the pump anyway, it's just good measure to change them as a set.

I hope this helps! :)

Mar 30, 2010 | 1999 Chevrolet Cavalier

1 Answer

Fuel gauge not giving the correct gauge level


more likely the fuel gauge in the dash is the problem, you can check this by taking the rear seat out to get to the fuel sending unit, then disconnect the connector while you have the ignition on and see if it change.
if it changes the sender is bad, if it doesn't the cluster is bad.

Feb 23, 2010 | 2002 Honda Civic

1 Answer

'01 chevy venture fuel gauge doesnt read correctly reads all over


fuel sending unit located on the fuel pump in gas tank

Jan 13, 2010 | 2001 Chevrolet Venture

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