I changed my fuel gauge on my Formula 3 and still dont work. I have 2 gauges and 2 sending units and they both dont work. I mean both sets work but they dont read correctly. My fuel gauge read 100% full tank no matter what i do. I have switched gauges with each sending unit and they all both read the same. I even DISCONNECTED the sending unit and the gauge still moves to full tank. The gauges move to empty when the sled is off but goes right back to full tank. What the heck is causing the gauges to read incorrectly??? The wires arent connected wrong either and even if I do connect them wrong on purpose the gauge doesnt work. Any Suggestions!!!!!!!