Would someone be so kind to share an original binary of the VX220 ECU with me? It can be retrieved through OBD2 with many cheap devices. Probably many of you have one.
I make some research about it and try to reverse engineer as many details of the ECU as I can. It would be a great help for me.
So far I'm able to:
- Disable EGR functioning.
- Change the idle RPM.
- Calculate a correct checksum for any kind of modification in the binary. (this is necessary to upload modifications without a special device)
- Modify the AFR. (under validation, not posted yet)
A summary can be found here:
Unfortunately the details are in hungarian but I will answer any questions you have. You can find the original links in the topic above.
Thank you in advance.