NYAP

So I have a 1997 Impreza outback sport that had a 2.2l in it. I swapped that for a 2.5l out of a 2000 outback and did my best to Frankenstein the harnesses together to get the engine to work. The research I had done previously said that an EJ22 ECU will run an EJ25. So I'm wondering if anyone can help me out if you have any information that may help. I did check and the engine seems to be getting fuel, air, and spark although I'm still unsure about the wiring on the IAC valve.