damn whats stock fuel pressure? 46 and 50 seems wayyy too high, i don't know the difference but my stock fuel pressure on my 88 crx si motor is like 30-32 and if i go anything above 40 i'll be running rich.... also what do you mean when "it smokes black smoke when you hit vtec"??? your plugs or from your exhaust or you see black smoke from your engine bay?? need some more info.