I haven't put the tank in the car yet. Just collecting parts for a bunch of work I have planned. I put a meter on it and it's accurate full scale. My instrument cluster is all Autometer gauges and this sending unit works with Autometer's Ford fuel gauge. You might want to check the range, ohms, of your fuel gauge before purchasing this sending unit. The one I am using is 73-10, 73 being empty. They make all different ranges so buying one won't be a problem.