16v 4age with itbs misfiring problem, need help

[johnny2]

CAR - ke70
MOTOR - ke70 running silvertop itbs and a microtech Lt-10s
USE - daily
PROBLEM/QUESTION - engine is misfiring and running rich
OCCURS/STARTED WHEN - bought a ke70 with 4age about a month back and it turned out the wiring was a mess, so me and a friend who has been and auto electrician for the last 15 years, rewired a new custom loom, rewired the CD player, the hid lights and alarm, and when we had finished it all off and started it up it had a misfire, and was running very rich. we bought new spark plugs and spark leads, but the misfire was still there, my friend had these special adapters which you put between your spark plugs and ignition leads which have a light in them so you can see if it has a any of the cylinders aren't getting spark and they all were getting spark, he also tested the injector to make sure all of them had power and they did, so I'm really confused and need some help or pointers to what could cause the miss, any help or advice would be appreciated