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Ya, problem is, the ecu with a flash tune store's the values of boost, IA, and a bunch of other parameters. It's not something they find during a quick ecu scan but it can easily enough be found. I'd be curious if it was user error in flashing back or if BMW was doing a deep scan.
I'm part of the bm3 group on Facebook and there are their fair share of dolts on there who only care about burbles and fire out the exhaust. I wouldn't put it past as potential user error as to why BMW found it so easily.
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