How did u guys learn how to modifiy your ecu (turbo xs, e-manage), why i ask, is that i want to learn is it hard

 

its not hard, just time consumming, i learned watching others

 

I am learning and I basically have been asking advice from others, analyzing logs, and taking babysteps to tuning my own car, first I would suggest making sure you understand how things work such and such (ie timing, fuel, egts, afrs, etc)