injector circuit malfuncion

I'll try to make it as short and detailed as possible. Got a 2010 ms3. Been doing basic maintenance on my speed the past year. After 15 short months finally got the speed3 back on the road. New turbo, New head, New injectors, timing chain, coils, spark plugs. I got the car in driving condition...

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...

Hey guys - just created an account on here, but I was a member on the mazdaspeedforums for quite some time. I'm trying to see if anyone would have any advice on how to best approach the P0204 injector circuit malfunction and P0304 misfire. The two CELs only come up during cold starts...