Help! Cummins Isx CM871 Programming

[Rawze]

(02-04-2023 )mxmom777 Wrote:  79382815 is the engine serial number.
The DPF is an aftermarket Skyline emissions 1280.

What do you mean the AV10051.xx program

First of all. you need an OEM DPF unit. After-garbage DPF's have always been problematic.

next...

That engine is originally supposed to have program AV10046.xx in it.. HOWEVER.. after 2015, they updated ALL of the DOC and DPF units for those trucks, and the old units are not even sold any more.

The DPF you were supposed to have that came with it when the truck was new is part# 4969702. <- That unit stopped being sold and was no longer available after Nov,2015 due to issues with them. The replacement is part# 5297522.

The replacement DPF units all required a change in programming as well .. so this means, after 7+years later ... that your engine is supposed to have program AV10239 in it and your CPL changes to CPL3749.

so ... This is why I pointed this out. Your screen shot shows you using a program that was invalidated back in 2015 due to newer DPF units that were supposed to come out. -> .. and those old DPF units should not even be used, but only the newer ones for about 7+ years now. This means that you should NOT even be using that program if your DPF was replaced with an OEM one at some point during or after 2015.
ref: http://rawze.com/publicfiles/docs/ISX/TS...umbers.pdf

Since you have an after-garabge DPF... then all is out the window on that because those after-garbage DPF units are ...

A)> have LESS precious metals in them, and don't work very well at all

and

B)> Don't even conform to the newer standards nor have the same flow rates, etc.. so if your truck refuses to regen it properly then it is no suprise.

Either it needs to be de-mandated (if you live in a country that allows this .. ehemm) like almost all CM871's out there are these days already are (costs literally nothing to do properly) or ...

PUT AN OEM UNIT ON BACK ON IT.. ONE THAT IS UP TO DATE --= PART#5297522 ==- .. AND INSTALL THE CORRECT PROGRAM AV10239.xx. It may or may not fix your issues, but at least it will not be a garbled up, questionable, half-arssed mess like it is now.