I currently have an 05 S2000, the original F22 did have a turbo set up and was running off an AEM EMS but was blown upon purchase.

I swapped over an 01 F20, my question is... To my knowledge the wiring harness, ignition cylinder, ETC is all the same.. however upon start up the engine ran super rich and stayed on for seconds at a time. Would this be due to the AEM EMS? Would using an 01 ECU work and solve problem..

Any help is greatly appreciated, thank you!