It shows way past full all the time.
Pulled the power supply to the sender from the gauge and measured the voltage. It was 8 volts.
Pulled the ground wire from the sender off at the ground post on the frame, put a voltmeter in series to the ground and got no volts.
Sounds like the sender is pooched.
Not looking forward to changing that.
I changed the gas filter and could see the filter element looked gummy.
Has anyone else had a problem with certain brands of gas ruining the senders? I remember Shell in Canada having to pay to replace ruined senders because they had a problem at the refinery that produced fuel that left gummy deposits.
If this is the case, is there an additive I could try that might clean things up, rather than replace it?
Thanks, Randy

 

I have a similar problem, except the gauge starts out normal until level drops to about 3/4, then it's pegged at full for a while, then it starts reading normally again at about 1/4. I was thinking maybe corrosion causing a bad contact in parts of the rheostat on the sender. But I suppose it could be gummy build-up as well.

Whatever solvents you try, use it with as little fuel in the tank as possible, to try to increase its concentration. I hear Berryman's B12 or Gumout is supposed to dissolve gum in the tank. That's what I'll be trying.