Cummins X15 after treatment issues

[Envirotec]

(06-13-2024 )tree98 Wrote:  Excessive soot production can have multiple causes. How often (looking with insite) is it asking for a regen?

Looking at the pipe itself is only a small part of what needs to be done.
When was the last time you did an EGR tuneup, where you actually replaced the IMAP and other sensors + cleaned out the Delta-P and exhaust pressure sensor passages, and replaced their sensors too?

Is it burning oil between oil changes?

Has it been asking for a parked regen? Have you been ignoring it ?

When were the cans baked last and who did it ?

Never done EGR tune up. Sensors have soot on them but nothing to make them unrecognizable. When I took pipe and sensors off, the soot load seemed to be okay?? DPF was baked with using the complete FSX equipment. It was done three times in three months due to truck shutting down from excessive soot in DPF (not the only truck either). Never looked at INSITE on regen history but it automatically throws the high exhaust temp light and shuts off if you are not parked. Thus, the parked regens take anywhere from 40 minutes to an hour and 15 on a daily basis sometimes twice a day in a 12-14 hour day.

My problem is that I had one truck with a MIL light for maintenance of the DPF. Nothing of serious concern (truck ran fine and regens were normal). But I decided to finally get DPF professionally baked starting with our oldest truck as I thought the mileage made sense to do it (430,000). Did four trucks in a matter of a month and then after a few weeks all the trucks now have the same issue with shutting down from too much soot in filter according to INSITE. Also, the trucks are always spooled up (sounds like regen) when parked but no high temp or parked regen light. This only happened after baking filters. None of the trucks had any maintenance done in regards to EGR and Aftertreatment systems (which I know is a problem). But there were no issues prior to baking the filters and DOC. I'm almost certain that the shop doing it and the equipment used is not the problem but at the same time all my issues arose immediately after filters and DOC baked. I even pulled the filter and DOC in photos above to re-test the filter without baking and they said the filters were fine. They suggested turbo issues but I cant wrap my head around all the trucks having a turbo problem. Also, when DPF and DOC was cleaned, I reinstalled without changing any sensors. I can see two trucks with roughly the same mileage having same issue at same time. But not four, different mileage, plus not having any issues prior to baking/cleaning.

Been struggling with this since the beginning of March on a daily basis. Refuse to bring to dealer on these issues. I've tried that and truck somehow comes back worse, literally every time. Its actually mind blowing! I'm in the process of doing EGR tune up now on one truck (photos above). I have a strong feeling it wont solve my issues but I'm praying that it does. The whole situation has me defeated and I cant see spending 8k on a turbo when I don't know what the problem is and 3k on a DPF. times 4.

Also, how have the Aftertreatment systems improved from the ISX engines to the newer X15? Is the EGR tune up process the same? All our engines are from 2018-2023. I believe they are the efficiency series 450 HP.

Thank you in advance!!