standard coil packs on a r33 misfiring is very very common, infact, nearly every rb25 and neo i know has had a coil pack problem.It tends to get
worse as the coils get hotter. I had this problem and i bought splitfire
coil packs and the problem went away. So if you replaced your coil packs with standard coil packs again, dont be supprised
to run into the same problem. Solution, try splitfires or yellowjackets..
also make sure u replace your sparkplugs with the right gap.
I hope this helps.