jdmp

The hatch starts perfect and runs fine for a while and then if you hit bumps itll sputter almost like mis-firing. I can hit the gas and nothing will happen for a couple seconds and then bam..itll go. Also its happens where I'll be sitting at a light and turn on the ac and the car dies. Then other times its fine. Drove yesterday with ac on and it was perfect but on the way home the car died like 3 times(no ac even on). Grounds seem to be ok and got new battery hookups. I was thinking alternator but it starts fine so its charging the battery. Anyone have a clue as to what it could be. Was just seeing if this has happend to anyone else before i drop it off at my shop. THanks!