At my wits end, good ole fuel gauge troubles

Dana67Dart said

With 4-5 gallons in the tank I would not expect much more than that from any aftermarket sender.

The curve (or lack there of) on these senders is full for 3-4 gallons, 1/2 for about 8 gallons then empty for the remaining 3-4 gallons.

Look at the graph in post 4.

Product Review: A100 Fuel Sender For 67 Dart

Click to expand...

I did see the the graph in another thread trying to read up on tips that I may have missed. Guess I can dump another 5 in and see what happens. When I replaced the tank and sending unit, all I had was a 5 gal can to pour in and I did take one little trip in it to check another thing I was working on.