Fuel sender adjustment?

[Darrman]

I am having a little problem, my brand new fuel sender is not reading correctly. I had the in-cab tank cleaned and repainted, then dropped in new fuel sending unit. It did not work at all before, as soon as I get this one in, the guage starts working. However, after putting in exactly 5gals of gas in the tank, it will read half full. I have done this twice, the first time it went down like it really was half full until it ran out. Today I put 5 more in and it says half again. Then I drive down to a hill where it will bring all the gas to one side, it reads a quarter tank, then go to level ground and it says empty till I start moving again, then it goes back to half full, wtf?
Any clue to what would cause this, or how to fix it?
Thanks!

[fordman]

it sounds like the ipvr might be out of adjustment. if that doesnt do it you can bend the rod to make it read correctly.