[GScivic7]

your bobber mechanism thing ( I don't know what the fuck its called) might be messed up. I believe that as it falls with the level of the gas in the tank it sends a signal and thats how your gas guage knows how much is in the tank.

BTW: I never trust any of the gas guages in any of our cars. I just go by mileage. Every 250-300 miles or so and it's time to fill up.