i posted this in appearance b/c i know a lot of people come by here but its in engine and internal too b/c i am desperate.... heres the deal

....the engine bogs( races and idles from 1000 to 3000 rpm)and the car barely moves untill the car warms up and/or it gets going for a while....if i press on the gas and floor it, it will go (struglling) and occasionally lurches forward while the car makes a few small backfires...its getting bad...i have no idea what it could be!!! please help