what causes the car to buck as if your running out of gas while driving

do you hav a ck eng light on? if so read codes and post so we can adv

my 2000 dodge stratus 2.4l dohc did this it was the crankshaft and camshaft position sensors. But my check engine light didnt turn on until it just didn't wanna turn on anymore and when it did it sounded like it had a fuel pump problem and everytime i filled up it would do this. Fuel pump was just replaced so i knew it wasn't that and you could hear the pump when you turn the key to acc. so the check engine light doesnt always turn on ahead of time.