What type of vehicle is it? Check your fuel pump, it control the gauge that tells you your fuel level. something maybe bad there or needs to be adjusted, but usually replaced in most cases.
The fuel sensor in the gas tank is bad.
It is inside of the fuel tank. You must remove the fuel tank to service it. You need to check the fuel pressure with a gauge FIRST. I would give you fuel pressure SPECS. But you did not say what year it was.
id say either a bad ground to chassis on the fuel sending unit (off the top of the tank.) or a bad gauge
Hey Jan==I imagine when you say floater, you mean the float on the arm for the fuel gauge. This is all part of the fuel gauge and you have to remove the tank, then remove the gauge and install a new one. I don't know why you would change it but make sure it is needed. GoodluckJoe
It could be that the gauge itself is not working, or it could be a bad sensor. The sensor in older cars is a float which could become stuck, especially if the tank was emptied completely. A blown fuse for the instrument panel will make the tank show empty (or full in some cars). If the car is still not running and the tank shows empty while it is really full, then the fuel pump may be defective. You could not have filled it up all the way.
The fuel gauge works on a variable earth type resistor. Basically if you were to ground the fuel float wiring to earth, it would shoot all the way to full. So I could say there may be a short in the earth circuit. Or what somethimes happens is the gauges over time begin to stick. Just give the top of the dash a tap. The gauge may resolve it's self if you do this, other wise I'd be loking a the fuel float circuit.
The gauge may be giving you a false reading.
It may be a problem with the sensor, which is located in the gas tank itself. If this is the case, the gas tank will have to be removed and exchanged for a tank with a working sensor. Needless to say, this is a job for a mechanic with a lift available.
sorry, have to say it, the full amount...umm, well around 40-44 liters
It sounds like you have a fuel sender problem. Without more info it is hard to say but they are usually accessed on top of the fuel tank and are part of the fuel pump assembly.
If this is happening to you you should bring your car into the shop. The reason why this is probably happening is your gas gauge may be broken or your fuel injection isn't working or your tank is already full. Id say just take it in. no further advice. Anthony
The best advice I can give is that the meter that 'floats' in your gas tank is either 'jammed' or is broken. The sad thing to say though is that most of these meters are inside the gas tank and to have it fixed then you will have to drop the tank and have it repaired, or if it is somewhere in the line between the meter and the gauge on your dashboard, then that can be costly too. I had the same issue on an old Ford truck. The mechanic said depending on where it is located and what all needs to be fixed depends on the cost.