It is a gas tank fuel level gauge that operates without the use of electronics.
your gas gauge float is in the gas tank you have to drop your gas tank and take out sending unit but if the gas gauge is not reading right you should check the ground wire on the gas tank
The gas gauge is in the instrument cluster , the sending unit for the gas gauge is inside the gas tank combined with the electric fuel pump
Its probably the float in the gas tank that tells how much fuel is left in the tank... its sticking.
The gas gauge and fuel pump are on two separate circuits tand both go inside the gas tank. The gas gauge usesf a float that moves a resistor according to fuel level. Gas gauges. When you experiewnce the gas gauge not working at all I would look for a disconection external to the tank first. If you cna send six volts from the tank sender to the gauge this should cause the gauge to read. If it does then you know the problem is with the sending unit and it must be removed from the tank to repair or replace.
Your gauge could be bad but sometimes the floats in the gas tank get holes in them and fill with gas. this causes the float to stay at the bottom and your gauge to read empty. U might also check the wiring from the sender at the fuel tank to the gas gauge itself.
If the gas gauge is not reading there is possibly a short somewhere between the fuel tank and the gauge or the gauge itself is broken. I have found that in most cases the sending unit in the tank has failed.
The gas gauge sensor is most likely stuck. It is inside of the tank and over time it will get corroded.
The fuel sensor in the gas tank is bad and needs replaced.
you need to replace the gas gauge sending unit in the tank, or your gauge is broken
Generally the fuel gauge sending unit located in the fuel tank is at fault for incorrect fuel level readings.
More than likely the fuel gauge sending unit located in the fuel tank is faulty.
smell,and the fact that your car starts:gas gauge