Fuel Quantity Issue

[Nicholas Soldevere]

OK Fellas, I took a short trip and found a few bugs. The most pressing is the Fuel Gauge reads below empty when full. I think I was able to sort this out one time by rapping the side of the tank with a rubber mallet. I tried that this time to no avail.

Any tips on trouble shooting? Also, does the sender come out the top of the tank or the side?

[Fred Cook]

Had the same problem. Solved it by finding a loose ground wire next to the tank. Hope this helps.

[Nicholas Soldevere]

Had the same problem. Solved it by finding a loose ground wire next to the tank. Hope this helps.

Thankyou for the info I suspect the issue may be related to something along these lines. Where was the ground wire , left right, front or rear of the tank?

Thanks!!

[Carl Boger]

Nicholas,

If memory serves me right the sending unit is on the drivers side of the tank a few inches down from the top.  There should be some nuts on studs that stick out of sending unit.  The wires go the the back of the fuel gauge.   If making sure everything is clean and tight on both ends doesn't fix the issue it could be the sending unit itself or the gauge.

Sending units are known to wear out.  I had to replace mine and it shows the tank to be completely full for the first two hundred or so miles.  By the time it drops to 1/2 tank it is fairly accurate. I really don't let it get to far below 1/2 so I don't know the accuracy there.

The gauge is simply reading a voltage level from the sending unit.  The voltage changes as the float arm swings up and down.  You can take a screwdriver and touch both post on the back of your fuel gauge to see if it swings all the way to the full position.
Hopefully this will make sense and help you some.