I have done the same. I ordered a used K1300s float sending unit off Ebay and I'm going to give it a try. I have looked up the part numbers on the K1300s for the sending unit and it appears the same part number from first K1300s on up is the same. Looking at the pictures of the K1300s sending unit with the normal float and resistor setup, there are two wires. These two wires would be the normal setup from one side of the resistor to the other, sending the the resistance values to the computer. The fuel strip has 4 wires. Two wires are from each side of the strip that reports to the computer and the other two wires are for a heater for the strip. The old school setup doesn't require a heater so these two wires are not needed. Now I don't know if the two wires from the resistor are in the same place on the plugs, so that will have to be determined and switched as needed. My other thought on this is the resistance value that the computer is looking for from the fuel level sensor (in our case weather it's the strip or the float). The computer is looking for a resistance value from the sending unit to determine how much fuel is in the tank. In the float version the float moves up and down in the tank moving the lever which tracks across some wire windings that sends a value to the computer. The strip would read the pressure of the fluid on the strip as the gas level goes up and down in the tank and sends a resistance value to the computer. So the question is if the resistance values from the old school float and the original strip are compatible or close in range. I don't know. If they are close, the metal support for the sending unit on the float version could be bent a little to make final adjustments (calibrating so to speak). My other thought on this is the resistance range. Hopefully someone who designed the software used the similar values. For example, if the strip uses values say 100 to 500 for its range and the computer is looking for something in this range as opposed to the float type sending unit was designed to use say 1 to 10 for it's value set. If needed a resistor could be added onto the the float type sending unit wiring to change the values to the range the computer would be looking for. Just thinking out loud so to speak. I don't really know, maybe someone has this information or can figure a way to find it. It is definitely worth pursuing to fix this problem. A good winter project for sure.
Last edited by du907; Jan 6th, 2020 at 10:57 am.