Re: Gas gauge trouble
I'll take a stab, but I don't quite fully understand your measurements and wires, but here goes:
The stock OEM senders are 90 ohms full sweep/full tank, 0 ohms empty.
The pot on the sender attaches to a float rod that rides on the level of fuel.
#6 reading tells me you have a half tank of fuel if you are using an OEM type sender. (you stated 53 ohms)
Now, if you have a 90 ohm fuel gauge, it should read 1/2 tank.
If it doesn't read 1/2 tank,and I guess it doesn't, then bench test your gauge. With a power supply, and a variable resistor, determine at what resistance it takes to sweep the gauge to 100% full and again at 50%.
You could just add fixed resistors together if you don't have a variable.
It is possible to shunt the gauge with the correct size resistor (maybe) to get it to read right.
Need more info though.
1969 RS/SS Vert
1031 Engineering llc