Reversing a bad (non cummins) tune

[Rawze]

(11-02-2026 )DVT873 Wrote:  In this case I am the stealers$it in that I have a parts and service contract that gives me the same access I had as a dealer. Int isn't like Cummins. A wo is not created when connecting. Once connected a template can be copied but that is rarely done. In this case not at all. I never touched this unit until this issue came up.
Short story is I can get a clean download directly from International. My concern is that there may be items like Mikkhh mentioned. Items that are not part of what gets reloaded on a factory flash.
Part of the problem is the R&R of this ECM is a major PIA due to add ons by the body builder. Access is really messed up. I may be overthinking this. I just found out that the rental replacement for this unit is running crazy money per day. One days rental will pay for a factory reman ECM. I think that is the next step. I may be overthinking this.

Personally, I think you mught be putting a bit too much faith in what Mikk said above. (assuming its a red engine ecu) ...

Cummins ecm's are not "hacked executable code" like car ecu's as a normal process... and hardware rom-booting one + incal file + a clean vehicle template is the way to ensure nothing remains.

Typically, the only exceptions are the consumer pick-up truck ecu's where the boot loader is hacked to allow bypassing of CRC, digital signatures, etc.. by third party tools to allow it to take a modified calibration program.