My car bucks and hesitates when accelerating in 1,2,3,and now 4th gear on 1990 Toyota Tercel

My car bucks and hesitates when accelerating in 1,2,3,and now 4th gear. I've change the distributor cap/ plug wires and spark plugs and it keeps happening. Any one k ow how to fix this

by in Marlton, NJ on February 14, 2011
1 answer 1 comment
ANSWER by on February 15, 2011
I'd replace the fuel filter. If it's clogged, the engine won't accelerate well so if you don't remember the last time it was replaced, just do it, it's time.
COMMENT by on February 15, 2011
Backflushed the fuel filter still no change