bmw running bad please help

My car is running bad had the coils replace and its still running like it is clogged down I can put the pedal to the floor and it just acts like the rpm goes up but the car is bogged down is it my engine going please advise asap.

from wat ur saying it sound like a slipping clutch if ur rpms r going up and the cars not going anywhre. need more info for this one. certain conditions? auto or manual? did it jus start or did it progressively get worse?