A few days ago I got into my 2005 mustang V6 and the fuel gauge went crazy. It went upside down and started pointing down. The rest of the gauges are fine and are acting normal. I looked on the web and found that I should disconnect the battery and reset it. I did this and it worked for a day and then it went back to doing the upside down thing again. When I turn the car on it moved but always goes upside down or gives me a misreading. I still know when I am going to run out of gas because the information center still tells me but the gauge messed up. I really need some help because I have no idea what I need to do. Any help would be very much appreciated and I will try to answer any questions that you may have on this topic.