Hey all !! I have a 99 F 150. Sometimes it runs perfect, other times it misses and accelerates like i have a 4 cylinder in it, or feels like i am pullin a camper. Sometimes it accelerates fairly well but misses and jerks while accelerating. The check engine light sometimes flashes on, but then goes off, and when i took it to get it checked , they said no codes came up on it. Earlier this year i changed all spark plugs and wires. Deleware has recently put ethanol in there gas, some people have told me that it causes junk to brake off ur gas tank and it is messin up many peoples fuel pumps and clugging fuel filters, I am changing my fuel filter later today, any ideas would be greatly appreciated.

 

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