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Flatbed777

Help … wallet on fire with no way to put it out….. ok my story on a swap gone bad. Had a Cummins friend who rebuilt the following engine.

Isx15 engine number 79940637 cpl 4586 build date 09/16 from a 2016 freightliner Cascadia vin 1FUJGLBG9HLJF0974 cm2350 epa 13 motor

Bought a blown up 2016 freightliner cascadia with the following motor in it

isx15 engine number 79830729 cpl 4583 build date 4/15 in a 2016 Freightliner Cascadia vin 3akjglbg6gshf6206 cm2350 epa 13 motor.

Installed engine and of course the engine will not communicate with chassis.. old ecm communicates with chassis won’t run engine. New engine ecm communicates with engine runs and drives won’t communicate with chassis no ecm detected won’t run anything in the cab.

What was I thinking trying to put a 2016 freightliner engine into a 2016 freightliner……
Just got back from Cummins and they said the ecm part numbers are different so they could not program the new ecm to run the chassis. my understanding is their was a baud rate change between 2015 and 2016 even though the chassis is titled as a 2016 it was manufactured in 2015 and thus the system operates at a 250k baud rate. The ecm on the new engine operates at a 500k baud rate I guess. I can say that the chassis does have the black j1939 plug not the green one.

I was wondering what I have to change on the chassis to bring it up to the 2016 standard I know I have to change the gateway but what else needs to be done… or is their something I can do to the engine to get it to run with this chassis. Already got a ton of money stuck in this need HELP!

APC

assuming that both ECMs have the factory programs in them... (EF10343 in the 500k ECM and EF10082 in the 250k ECM...)

you'll have to find a program that's compatible with the engine, but that runs on 250k speed. converting the entire truck to 500k can is way too complicated and too much work in my opinion.

from what i know, 250k ECM P/N is 5317106, and 500k is 4358814...

use the ECM with P/N 4358814 and try flashing program EF10338 in it with insite...

EF10338 is a program that has the same CPL code for your engine, same HP/TQ ratings, but shows that it is a 250k program.

if that doesn't work, the only other course would be to use the 250k ECM (P/N 5317106) and create a custom program that is made to drive the engine correctly, but can still communicate with all the other modules on 250k CAN speed.

Rawze

It sounds to me like your dealing with a someone clueless.

according to your post there ...

(your removing old engine) -> Engine ser# 79940637 as a CM2350-X101 engine. (program EF10343).

(installing replacement engine) -> Engine ser# 79830729 is also a CM2350-X101 engine. (program EF10082).

Internally, these 2 engines have the same compression ratio, same injection timing, same fuel settings, same injectors, same turbo, etc.etc.etc..

However, the programming itself for engine 79830729 (EF10082) is NOT compatible with the emissions systems for the truck, nor compatible with the the truck itself due to it being set to different buss speed. This is also why the CPL number is different. The engine internals that count are the same otherwise.

BTW: the ecm part# has nothing whatsoever to do with the buss speed. It can be changed int he programming easily enough for either ECM. The different part# for the ECM has to do with 2 things. They are...
A)> The newer model ECM can auto-detect the injector trim codes (not a big deal).
B)> The newer model ecm has support for an extra PM / NOx emissions sensors in the after treatment systems.

I.E.> that newer model ECM is NOT compatible with that truck.

-----------------------------
== SIMPLY RE-USE THE OLD ECM off the old engine, AND THE OLDER WIRING HARNESS for it as well. Put them onto the replacement engine. (some enignes)- If the fuel pressure sensor connector does not plug in, then swap the fuel sensor as well.

If it does not fire up and run, then there are other issues.

lastly.. if the engine has a delete program in it.. then copy it out of the ecm using Calterm software, and e-mail it to me for a review to ensure the replacement engine is not being chewed up by trash-can delete settings.

Flatbed777

I was hoping you would respond Rawse… I have no problem using the old ecm however the old engine was programmed at the 400 hp calibration is their anyway to program it to a 450 version? Do I have to input the trim codes for the injectors on the new motor to the old ecm?

Flatbed777

(Today )Flatbed777 Wrote: I was hoping you would respond Rawse… I have no problem using the old ecm however the old engine was programmed at the 400 hp calibration is their anyway to program it to a 450 version? Do I have to input the trim codes for the injectors on the new motor to the old ecm?

Flatbed777

Just so their is no miscommunication I am trying to get the 79940637 engine to run in the truck.

Flatbed777

Just checked with Cummins the engine harness is identical same part number for both #4373989..