New 2023 engine in a 2020 RAM 3500 with Aisin but 2020 ecm (Can someone help me)

[Johnmy]

Hi everyone, I have a 2020 RAM 3500 but I'm installing a new 2023 engine and I have the new blank ecm still unprogrammed bought by my VIN for 2020. My doubt is that after I finish assembling everything,

1- I have a programmer that is going to program my truck from the factory with my VIN and then I want to do the delete with Efilive, but my previous engine had a cp4.2 pump and this new one already has the cp3.3 pump. Can you help me what would be the best option for me please?

2-Or should I give the programmer some instruction for some update so that the truck works correctly with the cp3.3 now?

3- And then I can do the delete with Efilive without problems?
Thanks to everyone. I appreciate your suggestions.

[Jim P]

Dunno why you bought a new ecm for your 2020, unless it was completely toast and bricked beyond recovery but if you’ve read through previous threads on the forum you’d find that yes parameters need to be changed for the different injection pump or just use a 2021 calibration and good luck on the emissions delete. Just sounds like your diving into things with zero clue.

[Johnmy]

Thanks for replying Jim. I bought this truck at an auction a few years ago and had it sitting around until I decided to revive it since it was a big project, and among the things that were destroyed were the Engine, Transmission, etc, and the ECM was completely destroyed. So I got that 2023 Engine, the transmission, and a completely blank ECM but purchased for my VIN, as I said before. Excuse the ignorance, the programmer supposedly told me that when everything was ready and connected he would program the ECM with all the updates that were available at that time. I believe there is a recall for my truck about the problems with the cp4.2 pump where they change to the cp 3.3 and do the update. So if the programmer programs mine with the update that they supposedly already changed the pump, it would not work correctly? The Engine is almost identical and in fact came with the same Aisin Transmission, only mine was 400hp and the new one is 420hp. Sorry for the confusion of words. I just want to find the best option for me, since I delayed starting this project because I knew it was a lot of money that I was going to spend on all this and I want the truck to be as good as possible when it leaves the workshop.

[Jim P]

That makes sense on getting a new ecm. Yes there is an updated 2020 calibration that contains all changes necessary for the CP3 pump from Cummins/Chrysler for the CP4 injection pump recall, however that specific calibration isn’t necessary to use, a 2021 calibration works just fine or changing parameters in the CP4 version to that of the CP3, about 40 parameters or so, most of which are not mapped out in EFILive. A 2022+ calibration clone of parameters can be used as well. There are a few different options to go with. There really isn’t much difference between the 2020 and the 2022+ calibration for that slight increase in torque, mainly just some torque limits increased slightly if I remember right. It’s pretty straightforward and if there is going to be added power through tuning I wouldn’t be worried about if it’s a 2020 calibration used or a 2021 or 2022 or 2023 calibration as the differences between them for that slight increase in torque on the 2022+ is going to be irrelevant in the end anyways. All that matters is if the original cp4 calibration gets used, the proper changes are put into the calibration for the cp3 pump. All depends on who’s providing the file and what they go with, end result will be the same regardless. Yes deletes can be done, there is nothing in the EFILive software to do it, that stopped at model year 2010 so it’s all on the person providing the file to set things himself in the file to handle no emissions equipment. The world we live in now in regards to emissions deletes, just be careful of what is shared/mentioned, etc in a public forum about it. Certain people live within a jurisdiction that carries hefty penalties for it.

[Johnmy]

Thank you very much Jim for the details and for those tips at the end. Maybe it seems like a bit of a stupid question because I've only really worked with software and parameters for Heavy Trucks. But can these parameters that you say be changed or checked if they are correct after programming with Jscan, Alfaobd, the Kaodtech Security Gateway Bypass and the Vlinker MC+? Because I bought it for some changes that I was going to make before changing the transmission and a couple of other things but I never used it. If it can be done with that, is it possible that you can share with me the parameters that I should check please? Thanks

[Jim P]

No, none of those can be used to change the necessary parameters in the engine calibration for emissions or the injector pump.

[Johnmy]

And what software and interface do I need please?

[Jim P]

User defined parameters for EFILive or hex editing a .bin version of the calibration being used. Specifics of emissions I won’t give out though.

[Johnmy]

No, no emissions. Don't worry, I was asking you about the parameters I need to check or change after the pump change, and how I can see them and change them if necessary.

[Jim P]

Why not just eliminate the need from the start by using a 2021 calibration? Pretty certain one is on the forums here. If sticking with a calibration that doesn’t already have those changes from Cummins/Chrysler, well, can’t say where all those parameters for the injection pump are without knowing exactly which calibration and revision is being used.