ISB CM2350 to CM2250

[Rawze]

(10-29-2023 )RXMobile Wrote:  74160919-Replacement
73323134-Blown motor

Assuming you live in a country where it is legal to swap them willy-nilly like that ...

I have done plenty of ISX's like this, but not ISB, .. but it should be the same deal.

ISB2250 to ISB2350: I would think that the original (that came with the truck) wiring harness, ecm, etc. from the blown motor will run the new engine just fine. Might have to change fuel pressure sensor to the older version off blown engine I think though.

As far as the ecm programming goes, it should run the newer engine just fine, but a custom program will have to be written to accommodate the different compression ratio, different injector trim logic and several other things. Also, the injector trim codes from the replacement engine will have to be put in by hand using Insite before it is all said and done too.


I will need a copy of the old program that came out of it e-mailed to me, copied directly from the older engine's ecm, so that it has all the vehicle specific data in it already .. and only the engine ser# of the replacement engine, and you already have posted that.