So a small update...
Last night I pulled the ECU from the car, because after trying Nefmoto, KWP2000+ and Galletto (no boot mode) I couldn't connect.
Galletto would report that the ECU is a 400BB flash module actually.
So on the bench in boot mode I was able to pull the existing file correctly w/ Galletto. It was a tuned file.
I replaced that file with another tuned file w/ no protections, went for a drive and didn't like the way it drove attempted to re-read over OBD while in the car.. nada... same as before.
Also after driving the car, the code had a fault code that came back that originally had put the car into limp mode for the owner after my very first attempted to connect/read w/ Nefmoto a few days ago (P1681).
16683 - Boost Pressure Regulation: Control Range Not Reached
P0299 - 35-10 - - - Intermittent
18089 - Control Module Programming Not Finished
P1681 - 35-00 - -
Has anyone had this code before? I'm starting to think there might be an issue w/ the ECU itself.
I have flashed the ECU now (again on the bench) w/ a 100% stock file an both codes above came back after a short drive.
Not sure what's next.