I wish i had that info before i put mine in, took about a week for the afm to start screwing up, replaced coils, cas, afm and igniter, even had it tuned with the power fc to see if it was the standard ecu that was in at the time, was able to tune around the problem but it wasnt the best, i then told the tuner that it was the only thing that had changed, ripped it out and all was good, after that i wasnt sure if it was f**ked so i sold it as is for a few hundred less than i paid for it after spending another $1200 on parts and tune trying to fix the problem.
Also i found the ej1 to be lacking in what it could do, even basic stuff like the oil pressure gauge that you lose from the dash when you put it in a gtst, there is no oil pressure gauge in there, hks camp 2 is much better from the screen shots i have seen.