Hey any help or advice would be greatly appreciated, I have a 9-3 2.0t sedan I just put gas in it today and it went from fuel light on to full , I did some running around maybe 30 minutes of driving, then I look down and all of a sudden my fuel light is on I pulled over to see if I had a leak or could smell gas , it all looked good , got back into the car started it , fuel went back to normal/full drove another 5 mins or so then I watched the gauge go straight to empty , car is a 2009, has 70k miles on it , any help or thoughts would be appreciated thank you