Yesterday morning my volt meter spiked from normal to 19 for about a minute or so, then went back to normal. But when it went bavk to normal my gas gage went from reading half a tank to below the E. I did replace my fuel pump about a month ago. I tried disconnecting my battery to restart it but still nothing. It still reads below the E. Im not good with electrical issues at all. Any thoughts on what could have caused this?