Sorry so long, i really need help and i'm trying to make it clear. I have just installed my h22a into my 94 prelude and i have the p13 jdm ecu with it. It reads 4w which i suspect to be the 4ws prelude. I have the car running. It runs diecent when i drive it but the idle bobbles up and down. It stutters when i first it the gas from an idle. Also, when i try to hit vtec, it won't hit it and the redline stops at 6800 rpms. Its supposed to go to 7500 rpms. I checked my ecu to see if it was throwing any codes and it blinked a 12-EGR lift sensor malfunction or circuit fault, 21-VTEC spool solenoid valve malfunction or circuit fault, and 36 which i don't know but on another forum, they said that it was for atts so i'm not worried about that cuz i don't have that. But i tried checking the other two codes but no luck. Any idea's or comments would be greatly appreciated thanks.