vi3t00si

ok i swapped a 95 gsr motor in my 00 si and it started great but was'nt letting me rev past 2500 yesterday. today i went out and started it and it revved out at 8000 but after i turned it off i tried to start it again and now its not getting no spark. i checked the ignition coil fuse and it looks ok. im running on the obd2 wiring harness with the injector clips cut. im thinking it has something to do with my wiring harness because i had a obd1 b16 in it and it had a rough time starting but ran ok after it warmed up. does anyone have any ideas on what could be the problem/ problems? Any advise would help i tried everything to my knowledge to fix it but i cant figure out where the problems at. Thank you