scr warmup

[Mudflap77]

(05-11-2023 )Rawze Wrote:  regen history looks ok to me at a glance.

What do you mean you don't understand?.. Those SCR and DPF canisters cannot function properly if they fall much below about 450-F or so. IT IS ABSOLUTELY NORMAL FOR THE ENGINE TO JUMP BACK AND FOURTH IN OPERATING MODES TO REGULATE THOSE AFTERTREATMENT COMPONENT TEMPS PROPERLY! ... They cannot convert the exhaust gasses .. and therefore it will not pass an EPA inspection unless those cans stay hot all the time.

THAT IS WHAT IT IS DESIGNED TO DO... Keep the temperatures up and within operating range so that they can convert the exh. gases properly.

-= Sounds to me like you are worried about it actually doing its proper job, and your regen history looks like it is doing its thing as well.

If you want it to switch modes less often, then I would suggest you invest in an exhaust wrap to help keep the temps up.

What I don't understand is why it will going into scr warmup at low idle go inactive at 280f you start driving and it will remain inactive. Scr outlet can be up to 400-500 degrees when stopping at a light, engine at idle for 10 seconds or so it goes into scr warmup start driving it will stay in warmup for 30 to 40 minutes with scr outlet temp over 500f.
Get back to the yard 10 seconds at low idle into scr warmup. Let it do its thing until it's inactive and put it on high idle and bring it back to low idle it will go back to scr warmup.
It seems like it goes into scr warmup everytime it spends10sec at low idle regardless of temp.

If it is doing what's its supposed to when it's supposed to, Perhaps its shedding light onto another problem that the symptoms only show up when in scr warm up. That's what I'm trying to figure out here.
That's my main concern is the way it runs while driving in the warmup mode. Over boosting up to 40psi and chaulfing if not careful when shifting while in warmup mode and only in warmup.