Fuel gauge
 

My fuel is reading wrong and I have already changed the gauge and it's still doing and I wanted to hear what everyone thinks the problem could be.

Describe "wrong". No power? stuck on E? there could be a few different symptoms, all under the "wrong" category.

When I fill up from E it says I'm only putting in 8 gallons when I know my tank is a 11.9 gallon tank.

Keep driving then. It will go past E