Fuel Guage Problem

[john]

After having a walbro 255hp installed, the gas guage doesn't go any lower than just above a quarter tank no matter how low it is. Anybody know whats wrong because I am sick of figuring out I am low on gas when the light comes on. Today it took 23 bucks to fill 3/4 of a tank.
James

This is ghettostylels car. 95 tsi awd. I posted this while logged in under John's name.