Will_T
Well-Known Member
I considered just posting this in the thread about the DPF where it was previously discussed. But this is really not about the DPF and is specific to my truck so I will put it here. For background, those post numbers above are for this thread: https://hdrams.com/forum/index.php?threads/diesel-particulate-filter-gauge-is-it-working.9971/page-8 But, it is not necessary to read that to understand what I am describing here. Anyway, here goes:
My truck regened exactly on the 24 hour mark for the first several times at 24, 48, 72, 96 and, I believe, 120 hours. At the 144 hour mark, it did not regen and I think that is when I posted in that other thread. The truck had been in for some warranty work before the 144 hour point at maybe 140 hours, so someone suggested maybe the dealer had flashed an update to the computer and that had started the 24 hour count over. They said that had happened to them and when I asked the dealer they said it was possible the tech updated the computer even though nothing was noted on the service record. He said they just do it as a matter of course if there is more recent software. I have been watching since then and the truck just today turned over to 169 hours. There has not been a regen since the last one at 120 hours. I know I have not missed it because I have had the EVIC on the DPF screen, (which has read zero for all this time). Plus I have a Banks iDash which is displaying the "Regen On/Off" pid and also 3 of the EGTs. I glance at that a lot when driving so combined with the EVIC, I know I have not missed the regens. For the 24 hour regens the truck did do, I saw the iDash switch that PID to "ON". Also saw the EGT temps climb dramatically. That has not happened since 120 hours.
If the truck was sticking to the original 24-hour count and not resetting in the case of a flash, there should have been regens at 144 and 168 hours. Even if the dealer did do a flash when it was in for service at about 140 hours and that reset the count, there still should have been a regen at 164 hours. I suppose that an update to the computer could have changed the way regens are done. Maybe now, with a later software version, the 24 hour regens don't happen when the DPF is being sensed as pretty much 0% soot? But I am not even sure the dealer has ever updated the software as they can't tell me and apparently do not note it in the service record as done unless the customer has specifically asked for it.
I am not too worried about the missing regens *IF* the EVIC is reading correctly as it has been sitting on zero for a long, long time. I also mainly tow our TT with the truck and that may keep the soot level down. Although of the current 169 hours, 50 of them are idle according to the EVIC. I am surprised with the truck thinking 1/3 of its hours are idling, the DPF gauge would always be at zero. Even still, it should be OK, I guess and I would be more worried if the DPF EVIC was showing a soot build up and 24-hour regens were not happening. But, it was sort of comforting to see the 24 hour regens happen even if they were not necessarily needed. There has not been a regen now for 49 engine hours. I know I have not missed them and would have expected two in that time. What do you all think could be going on?
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