hey z fans, I need your help. I am having an issue with a fuel gauge. When I connect the gauge is spikes up to full and then goes back down to empty. The sender is new and I just purchased the remanuf gauge. Can anyone help. thanks.

Disconnect and short the two wires together at the sending unit, that ought ot send the gauge to full and it ought to stay there. If it does, its your sending unit. If it goes to full and returns to empty again, then its your gauge.