Rotabbynap

Hey guys, I’m having some issues with my fc and after weeks of doing nothing but scrounging these forums and everything on the internet I haven’t really found the information I need. So I have a 1989 na fc rx7 with 100k miles on it, about 800 miles ago an unopened 60k mile s4 engine was put into it. All of the electronics were swapped to an s5 aswell as the intake and all the necessary stuff. This is where the problems come in, so everytime I drive about 5 minutes in I can only give it about 10% throttle or else it’ll bog and misfire and won’t make power, this however can be remedied by turning the key off and then back on. I believe that my omp is fried and that in turn fried my ecu. The reasoning is because my ecu will NOT throw codes. I’ve tried grounding the diagnostics sensor I’ve tried making a led sensor, the ecu itself will not push 12v to the diagnostics port. The omp is removed from the block and zip tied to my passenger side shock tower. I also happen to have a 1986 s4 fc with everything in it except the motor needs coolant jackets. So my thought process is that I could pull my intake manifold and all the s4 sensors and swap all my electronics including ecu and harness to the s5. Would this work? I’m dailying my s5 blue fc and am a broke college student who in no way can afford a link ecu. I was thinking of also just going the microsquirt route but am very scared to try to tune my own car and risk breaking my only daily as of right now. Any help would be much appreciated. Would it be worth the effort to swap everything over or should I just take the risk and get a megasquirt/microsquirt and run a wideband and gm coolant sensor.