R32 GTRRRR

Ok i took out the fuel sender unit and the float is not stuck plus it looks in good condition!!! but the gauge is still stuck on reading 3 1/4 full?? i even filled the tank right to the top to see if it would move but no luck... how can i check to see if its the gauge thats faulty or the sender unit not working??

Hi guys My needle on my fuel gauge for my r32 GTR is stuck on 3 1/4 full.. Would this be my float stuck? or my sender unit buggerd?? Any info would help Cheers

Anyone know where i can get a new fuel tank sender for my R32 GTR please??