To the OP now with some more progress can you post an updated Tune file and Log?
You are getting closer though dont give up, as I try to remember I too used to have these same issues when I first when standalone. But like stated above, turn everything off like EGO control and Acceleration enrichment. For idle settings you should try Closed-Loop always on instead of moving only ive always had better results with. You definitely need to know for sure if your iac stepper motor is working or not.