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I have been watching my DPF Burn during Regen Cycles on Long Runs at highway speed. I have never seen my DPF Burn Down go below 30%
I'm wondering if anyone else is getting a lower number
Truck is a 2016 Gen II engine.
I took it in preemptively for the flash to avoid the jack hammering people describe, so in theory I should have the software updated that runs both banks.
Question...I've seen some people say the see 10 psi of boost steady during a regen. My truck doesn't hold a steady 10 psi boost, but it does spoil up faster with less throttle during a regen. What boost levels are you seeing?
I've had the regens stop anywhere between 30% and 55%, but 35% most of the time with some additional burn off after the regen for another 5%. I've also had them last anywhere from 12 to 30 miles even at highway speeds. The good news is they only occur every 500 miles for me since I do little stop and go.
When I towed heavy with my 2012 and had a lot of passive regen going on, I'd get to 0% and stay there for 4-5 days after I returned from a trip. When I used the truck as a DD, it would actively regen down to 0% if I drove it long enough. Put it in park and you stop the process until next time you're at 100%.
My 2016 usually stops around 20-25%. It went down to 10% on the last regen. I have noticed after its done doing its cycle it'll usually drop another 5% if I high idle for a min or two
It drops another 5% whether you high idle or not. If I get home and shut down during a regen, it's always 5% lower the next time I start. It can't continue to regen due to high idle. The regen cycle is stopped when the truck is under 8 MPH.
I think the 2016s have a different strategy. Mine also rarely goes below 25%, even though torque pro show .8 g/l of soot. Drove 450 miles yesterday pulling the Cardinal through the mountains of WV/VA, soot was already at .7, and the 500 mile Regen kicked in. Dash % went from 80% to 30%, but soot went from .7 to .82. in other words there was nothing left to burn after the long tow...
I'm confused because I tow a 12' tall 18' long equipment trailer that weighs over 10,000lbs all day for thousands of miles a week (8,000 miles this month) and I never ever see my dpf percentage go down unless I'm in an active regen. I have never, in years, seen any evidence of passive regen and I know I'm tugging around plenty enough to do it. I average 9mpg and the turbo spins at least 10psi all day, lots of fuel being burned all the time.
I get active regents at 85% some of the time, sometimes it goes on until the display says full. Then it runs down to 35%. Same thing over and over approx. 500-800 mile intervals.
I don't really care about it but it does confuse me. Seems like I should be getting beneficial burn but I don't, so it is what it is I suppose.
All the evidence I need to know if there is sufficient engine load to create passive regen is in the fuel mileage. I never get more than 10mpg running 55mph or faster. That should be enough.