Defective in tank sending unit or the float has a hole in it and it's full of gas and stays at the bottom of the tank sending a false reading. Usually it's the latter issue. Floats cost about $8.00 at Napa.
It could also be the fuel pump wiring harness is corroded. It is under the car (exposed to the elements), just behind the driver's seat. My gas gauge has been flaky for a couple of years. Now the fuel pump cuts out occasionally and I have to reach under and wiggle the harness to be able to start the car.
you should go to a car shop for that one!:)
Float could be stuck in the tank or the ground wire on the tank is broke.
I would suspect the sending unit in the gas tank is at fault.
I have a problem with my 2 door Toyota rav4 2002 fuel gauge. it reads empty when in fact it is partly full. When filled up at pumps it then reads only half full. What can I do to fix this.
i have a 1990 ford ranger and my fule gauge always reads full, why?
i would recommend getting gas when that happens. perhaps take it to the mechanic to fix the gauge
I would assume that the wires are hooked up backwards
The gauge or sensor needs to be replaced.
My 2000 GLS does the same thing. When I fill it it reads full for a few moments then goes to straight to empty. If I am going down the road I can shift into neutral shut the motor off and restart but the gauge does the exact same thing again. I was told it was the sending unit but have not fixed it yet. The guage works fine after some driving and the needle comes off full.
In most cases the sending unit in the tank is at fault.
Where is it stuck? on full or empty? if on full you got a bad ground, if empty you got a bad float.
check your conectors or the float might have a hole in it
Either the gauge is broken or the sender is broken.
Failed gauge, wiring, or level sensor.
BUY A FORD
In the gas tank
bad fuel pump it could also mean that the fule ammount sencor is out.good luck.
The way to test the gauge is to unhook the wires to the sender and the gauge should read empty. Now, ground the sensor wire and the gauge should go all the way past the full level. If this happens your wiring and gauge are fine.
The floater inside your pump is sticking. You will have to replace your fuel pump in order to fix this problem.
The fuel gauge could be getting improper signals from the fuel sensor. The sensor is located inside of the fuel tank.
Your fuel sending unit is not giving the correct reading to your gauge
Defective fuel sending unit.
my 86 did the same never would read more than 1/4 tank after lots of checking things i replaced the gauge and it worked perfect..
Well, usually there are several possible problems that can do this. Some of the more common problems that people experience with their fuel gauge is that it reads empty at all times, another is that it reads constantly full, but the most common problem is when the gauge will read differently at different times, fill the tank and it will read empty, be about a quarter of a tank down and it will read full, that sort of thing. In the more common cases, the problem is with the fuel level sending unit, I do not know much as to how to fix it, but I have seen several websites that give advice on this problem.
Sounds like the transfer pump in the rear tank is bad and you are running out of fuel in the front tank. The fuel gauge reads both tanks and gives you an average between the two. So, if the front tank is empty and the rear tank is full the gauge will read aprox a half tank.