sounds like you need a tune up, or a clogged cat. what plugs you use last, and the gap?
some how im sure your not scanning for kr. most canned tunes raise the timing and with no flow mods at all, your asking for a chipped piston.
when you get kr the pcm pulls timing and the engine will fall on its face if theres enough kr.
cheap parts store wires work just fine to btw. you dont need 10 mm wires.