My daughters car is running rough, specifically on hard acceleration. When you mash the gas it initially takes off, then stops accelerating, check engine light starts flashing. I have replaced plugs and ignition coils this past week. It was doing this prior me doing the plugs/ignition coils. I was hoping that would take care of the problem. My code reader shows multiple misfires (300) and also cylinders 2/3 misfiring (302/303). Any input would be greatly appreciated.