I recently had problems after fixing some problems with my d16z6 swap in my ek hatch. I had thrown some codes like 02 sensor bad iac, and evap. I also had been runing a p2p ecu on the d16z6. So went out and bought a p28 chipped skunk2 ecu. Then I changed the distributor, 02 sensor, and iac. After changing these when vtec ingaged it did not hit as hard. So i figured that the ecu would fix the problem. After swapping ecu out i can feel a big surge at 4000 but i flat line in the powerband at 5500. I really have a big power loss. Please let me know what you guys think. Thanks.