You know, I beleive it was every other plug. I know for a fact the the two front plugs were the black/oily & worst if that tells you anything. If I were to go out and take the car for a ride right now it would start with NO problem, idle perfectly and would drive/run great if I were too just drive around very casual.

Then, if I were too take off from a light and hit it fairly hard (not crazy) it would get through first no problem, soon as you hit second and give her the pedal, it would bog, put & backfire and run like total crap. Then back off, let the car "recover" and give it some gas nice and easy, back to running fine...