Hi ....hope you can help. I have a 318i R reg (98). My car runs great but the fuel gauge has recently stopped working.....it shows an orange light and empty on the Gauge...even if I have filled up. I have checked all fuses...non blown...so can you suggest a solution please and perhaps tell me if this is something I could do or does it need to be done by a mechanic??
One of two problems. Float on righthand side sensor catches on the tention beading ******** tank. Remove and bend arm to cure problem.
Secondly, resistances on sender units in tank are out of speck. Check resitances with ohm meter. Each indiv. sender should read 5-250 ohms. (zero to full position)
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Re: Fuel Gauge always shows empty
See if there is any acces to the fuel tank cover under the rear seat, if it is then remove the screws and remove the sending unit sending unit inside the tank most likelly it will be bad, but if you don't feel like doing it, then take it to your mechanic but seems to be the sending unit inside the tank wich is the sensor trigering your gage is not good and need to be tested and replaced
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The power wire from the sending unit runs to the gauge. Since it is showing 3/4 all the time. It is a break in the wire or really high resistance. I would check resistance of the ground wire first. If it is good(less than 5.0 ohms), I would replace the power wire from the pump to the gauge. I assume the gauge goes to empty with the key off. If not the gauge is bad.
Hi Carolyn, It could be the sending unit but with out testing you can't be sure ! Your best bet is take it to a ASE certified repair shop. At the dealer we have a tester that hooks up to the sending unit wiring harness an we can test the fuel gauge , to make sure that it isn't the problem ! You could buy resistors of different resistances at radio shack an test it that way too ! I had a Deville I was working on doing the same thing , pulled the fuel tank out, an here the baffle inside the take came lose an was hanging up the float arm ! Could be a lot of thing's , wiring , control module , gauge or the stepper motor that controls the gauge ! GM vehicles from 98 to 2005 or so had bad stepper motors that caused instrument cluster gauge problems !
It could be the fuel sending unit which is located in the fuel tank, it works with a float inside the tank and a sensor will send the reading with the amount of fuel in the tank to the dash gauge so you can read how much fuel you have.now if the float is burst it will fill with fuel and remains at the bottom of the tank showing empty tank.hope this helps.
I tell you for sure that is the sensor problem from gearbox.the sensor, or the wire. The fuel gauge is connected to the gearbox because is not very nice to corner and the fuel gauge go up and down. Now because the fuel gauge "didn't know" how many miles did you made, he is moving up and down. All recent cars have the same problem, and had the same problem on my girlfriend Golf 4. It was the wire. The mecanic forgot to put it back.
suspect it could be tank unit this is similar to a ball valve in a toilet .float arm moves up or down depending on fuel level sends reading to gauge situated in fuel tank sometimes part of the fuel pump
Hi there. If the fuel gauge is the only one acting up, its probably a loose or corroded wire on top of the gas tank where the fuel pump sets in. It could also be a loose wire on the back of the gauge, which is easier to get to so you could always check that first by popping off the dash pannel and pulling out the instrument cluster and looking for a broke wire on the back of the fuel gauge. But if I had to bet I would guess its on the other end by the fuel pump. Worse case sinario, maybe a bad sending unit.