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Switching to SD and want to save the mass air tune I paid for from a dyno tune.
It seems to let me download, but does not seem to recognize what it is reading (wrong ROM file??)
I tried several of the USDM EVO8 files listed here. https://evoecu.logic.net/wiki/Downloads.
I can't post tune here, as it is a vendor's and against forum rules.
Only reason I may probably go back to mass air is if I sell car at some point. I can't go back to a stock type tune then,
as I have too many mods (including cams). My question is, even though EVOscan does not recognize what it downloaded.
If I someday put back exactly what I downloaded, will it give me back that mass air tune and run just like it did before I "wrote"
over it for new SD tunes?
Your tuner may have modified the section of the ROM that refers to the ROM ID. For ex, I've attached my Evo 9 ROM Hex.
That's what lets ECUFlash know which ROM xml file to try and use. When a tuner wants to avoid you looking at it, they'll change it to FF FF FF FF or something. So you can download/re-flash it just fine, but ECUflash doesn't know how to parse it. You should open the stock evo 8 ROMs in hXd, find the ROM ID, then open your ROM, and look at that address to see what it's set to.
Your tuner may have modified the section of the ROM that refers to the ROM ID. For ex, I've attached my Evo 9 ROM Hex.
That's what lets ECUFlash know which ROM xml file to try and use. When a tuner wants to avoid you looking at it, they'll change it to FF FF FF FF or something. So you can download/re-flash it just fine, but ECUflash doesn't know how to parse it. You should open the stock evo 8 ROMs in hXd, find the ROM ID, then open your ROM, and look at that address to see what it's set to.
