Steve, I just went through the same problem, gauge was reading empty all the time with just a slight flicker when turning on the ignition, I checked the the ground and made sure the juice was getting to the sending unit, next pulled the unit from the tank and with two jumper wires grounded the base and connected the sending unit to the gauge wire and moved the arm by hand gauge and sending unit were working fine, just no float left in the old cork, I believe due to the alcohol that is now added to our fuel dissolving the shellac coating on the cork, good luck. Byron