Starts and idles great, but once in second gear around 2800+ rpms the vehicle starts to jerk, almost like it is misfiring, but I am not sure what the problem is, no codes have came on yet, no check lights no warning lights at all...

What could the problem be, I was told it could be the Duel ignition coil Packs, but they are $100 new, I don't want to spend $100 and that not be the problem...