Heres the deal. I have a 90 ef hatch with a gsr swap. The car was previously running on obd0 and it ran fine. But i wanted to convert to obd1 for the better tuning options. So i recently converted the car to obd1. I put in a new obd1 distributor, 4 wire O2 sensor, a p28 ecu with uberdata, and an obd0 to obd1 jumper harness from rywire. The car starts and idles fine, but when i rev the engine it bogs and stumbles untill it gets to around 5500 rmp, then it acts like its on a rev limiter and starts to pop and wont rev any higher. I have checked the timimg 4 or 5 times and im sure that it is right. Does anybody have any clue as to what my problem could be? Any help would be great.