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Message: [QUOTE="me2, post: 330940, member: 3825"] My ECM Situation I have an 09.5 engine. I need to use EFI Live to adjust a few thing in the ECM I'm using. Unless I want to wait until EFI Live does a release for the 09.5+ (CM2200) engines, I needed to convert my engine to an 07.5 to 09.5 (CM2100) harness and ECM. The CM2100 and CM2200 harnesses appear to be the same with the exception of the ECM connections. Caveat. I have not plugged every sensor on my 09.5+ engine into my CM2100 harness, nor have I run my engine yet. But I have been through both the engine I own and the engine my CM2100 ECM came from and everything looks like its plug and play. Except the injectors... I'll get to that in a bit. Before I forget, be sure to get the ESN for every Cummins part you ever buy because its EXTREMELY handy to use to cross check that things fit between engines. I have the ESN for my engine, the CM2200 ECM and wiring harness, the CM2100 ECM and wiring harness and the rods that I am putting in my 6.7. And if you buy an engine, be sure to get the VIN for the truck it came from as well. Injectors. The 09.5+ injectors are different from the pre 09.5 injectors. How, I don't know. What I do know is that the CM2100 and CM2200 ECMs need to be/should be programmed with the data for every injector installed in the engine. Every 6.7 injector has a tag on it with a code that represents some physical attributes for the injector. The ECM needs this information in order to be able to properly fire the injector. EFI Live has stated that they are adding functionality to allow users to input the injector codes for an engine. What I am hoping is that the CM2100 ECM is able to use the injector data from the 09.5 injectors. I don't think the injector data does anything more than give the ECM trim data for fuel output, but I am guessing here. I suspect that the CM2100 ECM will run my 09.5 engine fine without injector code data, but I'm guessing here as well and I'm pretty sure it will run it better with the injector code data. I'll leave the ECM stuff at that for now. I'm sure I've forgotten something and there are errors, but I'll add/correct that in a later post. [/QUOTE]