I just bought an 88 Trans Am and my fuel gauge keeps dipping down for full to empty when I fill it up. It does till I reach about 200 miles and then it will stay at 1/4 of a tank and go down normally. I think it is the float in the gas tank but wanted to know if anyone else had this problem and could it be electrical?

Thanks

 

Might be a sensding unit, check that out before you drop the tank.

 

Just guess. I've asked this question before, and found that a lot of Pontiacs do this. There are better things to do with $100 or more than a fuel guage or sending unit.