I have a 97 F150 with a 4.6. When i hit 45-55 mph i have a stuttering problem and i replace the fuel filter. I live in Fairbanks, Ak and it gets very cold here and i didnt no i had to have a half of tank and the guy at work said it was a filter problem.. Please help thank

 

It sounds like you/he is suspecting that you have water in the tank. I'd first try running Sea Foam in the tank to see if it clears up the problem.