1999 Toyota Camry

It seems when I have just above a half a tank of gas in the car, the car starts to jerk, almost like the gears are slipping. It continues past half a tank, goes away for a while and returns near empty. When I refill, sometime I put dry gas in and that seems to help until I get to about a half a tank again. What do you think it could be?
July 18, 2007.

You need a fuel pressure test-this will tell you something is wrong within the fuel system.

Possible causes: fuel pump on its way out, clogged in-tank pick-up screen/fuel filter, fuel pressure regulator not maintaining pressure/dirty injectors etc.

Jul 18, 2007.