was the idle problem an erratic idle? does it hesitate at the same rpms all the time or just all over hesitation? Also, did you check to make sure that the Si pump is adequate for the h22 motor? Because it may not be getting enough fuel thats why it hesitates or has a loss of power.... Also, is the hesitation feel like a complete stop of the motor when raising the rpms or just a little annoying? I used to have a 93 integra that was hesitating where it would feel like it would completely stop when I was accelerating sometimes, and it ended up being loose wires going to the ignition module..... dont know if any of that helped but let me know.....