Sounds like an air/fuel mix problem. Really need to do a diag. As suggested earlier, go to autozone and run the codes. The codes will give you some clues, but not the answer. The MAF could be the problem and is easy to check. However, you need a Torx driver that has a hole in the end. Sorry...I am getting complicated now, aren't I? Start with a code check and go from there.
IMHO...it is not the plugs or the wires. It's a mixture problem.