2000 Kia Sephia sputtering/hesitation
i have a 2000 sephia with 47000 miles.
its fine in town, but when i drive at highway speeds (70 mph and above) for several miles, then leave the interstate, i go to stop at a light or stop sign.
then when i start to take off again, it sputters and hesitates like its about to shut off.
after a few minutes it is back to normal again, as long as i am in town.
anyone have any ideas?
p.s. by the way, i have recently replaced: the fuel filter, and all spark plug wires and plugs.
p.s.s. its still under warranty until 2010 or 100,000 miles, but i'm sure none of this will be covered unfortunately.