Ok so i was on my home yesterday and I went to get on it and the car just starts spitting and spuddering like crazy. I left off and ease back into it and it's fine. It only seems to do it real bad if I put a load on the engine. When it's idles sometimes it misses and other times it's fine. No check engine lights for anything other than the o2 sensor that I already knew needed changed. Plugs were changed right before I got the car. I changed the coil packs. Could this be a plug wire issue or could this be something else?