you probably need new o2 sensors. that or a dirty maf. how long's your light been on? mine just came on a week ago and i had it scanned. bad o2 sensors. it still runs perfect, but if you don't take care of it, it will eventually affect gas mileage. but it takes a long while before it actually grabs your pocketbook. mine runs like a scalded dog, atx. if you can classify a zetec as running fast at all. seems fast for a crappy 4-banger. go buy a SHO taurus if you want a really fast sedan. pre'96 that is.
