c'mon we all know what happened
the power fc was replaced with the stock
ecu to limp it to a workshop, with claims of boost control restrictor in the wrong line we can safely assume that the stock boost control solenoid we also reconnected
so.....
when you put the power fc back in there mao, did you reconnect the 3port boost solenoid also or just leave the stock solenoid connected? we all know they have different operating duty cycles so if the power fc thought its running a 3 port when its actually running a stock solenoid it would not be controlling the boost properly
this is the only logical explanation & hardly fair to call out another workshop saying that this was thier tune & done with a dodgy afm