Mine does that sometimes. I haven't found a fix for it yet. I dealt with it for a few weeks and it went away. I haven't had the problem now for probably about three months. My advice would be to make sure you don't over fill the tank and maybe even try snaking a long tube down the filler neck to make sure there are no obstructions. hopefully if it is like my issue it will go away on it's own
2000 Celica GT-S - "Frankenstein" CAI, Boosted2.0 Ported Header, TRD Exhaust, ES Motor Mount Insterts, ES Suspension Bushings, Southbend TZ clutch, Fidanza Flywheel.
2013 Raven Black Scion FR-S - Unmolested, for now