Yes and no. I think I may have gotten my acronym wrong. I had run across a JEC forum post about reprogramming the Zytek ECUs and someone noting that there was a file type difference or difference in file types (EM3). [https://www.jaguarforum.com/showthre...t=32464&page=3] I filed that away and noted on later reading that the Bentley Arnage had an EMS3 system (F1 derived) and elsewhere that the MR14? ECm used in BBTC racing had an EMS2 system. Somewhere, that I'm unhappy I can no longer find, I ran across the description of the systems as they evolved from each other noting that injection pulses in the earlier system were split in two, and split into 3 in the later system (although I think EMS3 also encompases a lot of additional improvements.) If I can find that particular blurb of info again I'll post.

EM3 can certainly refer to Electromotive. Is there an EM3 Zytek file type? Maybe the poster was referring to EMS3 vs EMS2? IDK.