I have similar problem with my 1999 Contour, zetec 2.0 liter, with automatic transmission. When fuel tank gets below half, the cas will occasionally stumble, especially on hard acceleration. I thought it was dirty gas, but several cans of gas dewater/cleaner/treatment later there is no improvement. You think that I need a new fuel pump or is it just a plugged-up fuel filter?
Your input will be appreciated.
