My tiburon missiles when cold and sporadic battery light and dim lights

What is your question?

I have replaced several sensors, coil, alternator battery. My car misfires when cold, the rpms jump and it almost stalls when accelerating. Now the lights dim and the battery light come on. The alternator was tested and was good. This is driving me crazy. I would appreciate any input. Bcm? I tried another ecm and that didn't fix the issue.