Nick4421

Hello i’m looking to buy this 350z and the guy selling it says it has a misfire under full throttle but no misfire other than that, before i consider doing anything i just would like to hear any suggestions on what it could possibly be, below i will list his mods. It would be much appreciated if anyone could throw some ideas as to what it could be before getting into the hassle of dealing with a misfire, he says the check engine light comes and goes but never stays on.
Tuned with Uprev (tuned for e85 or 93 pump)
Stillen gen3 intakes
Z1 full exhaust
Gtr 550cc injectors
Z1 diff cover
Ngk ix iridium spark plugs recently changed
Z1 high energy ignition coil packs