Fixed! It was the wire harness to ecm plug. I used a pun to check if the pins were getting contact and the injector 2 pin had no resistance while pushing in the pin. Took the plug apart and fixed the connector and it runs perfectly.
While on a long trip my 2008 Mazdaspeed 3 suddenly lost power and the engine light turned on. Did a noid light test to find that injectors 1 and 2 were not firing. Tested continuity down the wire harness all the way to the ECM with no issues. I even replaced the ECM with a refurbished one and...