I just recently bought a PSOP adapter for my willem and having some similar issues.
I erased the flash chip, and programmed a good bin file I had read from tunercats. When I soldered the chip back to the board I am not getting any communication with the PCM thru winflash. Soldering looks fine.
I'm not sure of this byte swapping you speak of, is it necessary if the PCM had a original calibration or TC modified cal on it? Thanks
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