Originally Posted by
Pulse_GTO
The XDF you are using is not the most complete for the 7603 OS. I developed an XDF for the 12593058 OS based on the 7603 OS and I'll be attaching it to this post. I believe that the 3058 OS is only compatible with 2003 PCMs that had the Intel chip and will not work with P59s that have the AMD chip. You should be able to flash the 7603, or any other OS to the Intel chip, but you cannot flash an Intel OS to an AMD chip.
Either way, I'm attaching the XDF for the 3058 OS so that you can use your factory OS. You will need to copy the plugin file to your "Plugins" folder in your TunerPro directory and the checksums should not be an issue. I'm also attaching the most up to date 7603 XDF with the matching plugin (it's the same for both, only need one copy).
Now it's up to you if you want to keep the OS that came with the PCM, or change it to 7603. They pretty much have the same parameters defined, and if it were my PCM, I would try to keep the original OS with it.
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