fuel gauge wont work?
 

so my gauge hasnt worked since i bought it. is it the gauge or the pump??

Hard to diagnose remotely. You'll have to check this one yourself.

One way to check is to check the resistance of the in-tank sending unit. Go into the trunk and disconnect the connector to the in-tank pump and gas gauge sending unit. There should be three wires. Gray, Black & Brown. The brown wire should be attached to ground. Using an ohm meter, check the resistance between ground and the gray wire. Depending on how full your tank is, the resistance should be somewhere from 40 to 300 ohms. If its higher than 300 ohms (or at infinity), then you have a problem with your sending unit. If it is in that range, then the problem is either in the wiring north of the tank or in the gauge itself.