If you are running a b18c1 with the secondary IAB's, use the p72. What do you mean, it runs like crap? Don't immediately blame the ecu, it could be a host of possible things that could be wrong with your motor, wiring, etc. that contribute to the poor peformance. Check everything out, make sure everything is hooked up correctly. Did you perform the swap? if not, take your car to the place that did, and tell them what is going on. Or tell us what your problem is, and we will do our best to try and help you out.