Needing some help figuring out whats up with my fuel gauge.
I have a new 19 gal tank with a new sending unit( which i've Ohm ed twice and according to this site, is in the required readings).

I've tried two different Gas Gauges and both read about the same.
When i fill up, it seems like within a hundred miles I'm on empty.
So when i went to fill up, i put in 10 gals and it was full again.

I had to run a new wire from the sending unit to the fire wall because the old green one looked like somebody took a test light to every inch from the cab back and it had holes like crazy.

I took my Dremal and ground down to fresh metal for the ground, and when i ground the sender wire to the frame, the needle moves past full, so i know I'm good there.

But what would be causing my gauge to read half?