hello again, so I put a new gas tank and fuel sending unit in and just put five gallons of gas in. the gauge does not come off empty. I cleaned the ground and still wont work any thoughts?

 

Remove the tan wire from the sender and see if it goes past full with the key on. If it does then your circuit is working right but your grounded somewhere at the tank or sender.

 

so yes it does go all the way past full. what do you mean by grounded? do I have a bad ground?

 

If you ground that same wire with the key on it will do exactly what your gauge is doing when it's connected to the sender. Whats happening is the circuit is finding a ground and not reading through the sender. All your wiring from the tan wire back to the gauge is fine, so your problem is either the sender or the sender wiring.

 

ughh!! its a brand new sender.