My wife and I were coming home from a car show. I stopped to gas up. The pump failed to shut off spilling gas all over my car. I cleaned it up and got home. The gas gauge was buried. When I shut the ignition off the gauge went right passed the full line. I checked all the wire connections, everything indicated okay. Next I removed the port where the float is at in the tank. I moved the float toward the bottom, gauge went to empty, pulled it to top went to full. I closed everything up and turned on key needle was passed full line returned to full. I shut off ignition and needle went back passed full again instead of returning to empty as it should. The float is less than1 year old, the fuel gauge was installed in 09. I have removed the seats and carpet to check all wiring and found nothing. Any ideas?