Ford Repair: 2000 ford crown vic, ford crown vic, ford crown victoria

Question
I have a 2000 ford crown victoria it hesitates between 30 and 40 mph and it has poor acceleration in beginning till I get past 40 mph I changed spark plugs coils fuel filter air filter pcv valve and the throttle cleaned and injector system cleaned and still same problem  can u please help me

Answer
I pulled you're question from the pool and thought that I would give it a shot.Since the check engine light on there will be several things to look at.They start with a clogged fuel injector.Cleaning the injectors does not always clean them.Have you're catalytic converters checked to say that you did.The cost is minimal if any at all.When did the problem start and how many miles are on the Crown Vic?When was the last timing chain replacement?