Regen cycles
Mountain Pass
Joined: Jan 2022
Posts: 136
Likes: 113
From: Driving
2016 mainly highway miles no recent towing, regens always 500 miles apart. Most recent regen lasted 50 miles. Of course after a 1.5 hour drive, it started the second I pulled into a parking lot. Shut it down right away bc i don't care anymore
..... Anyway after a day trailriding, the truck immediately starts exhaust cleaning on the journey home. 15 miles on twisty country roads so exhaust took forever to warm up, dpf % didn't change. Once cruising 75mph on the interstate it started going down. Hope it's not a sign of future issues. Crushed my mpg and a 1/4 tank.
..... Anyway after a day trailriding, the truck immediately starts exhaust cleaning on the journey home. 15 miles on twisty country roads so exhaust took forever to warm up, dpf % didn't change. Once cruising 75mph on the interstate it started going down. Hope it's not a sign of future issues. Crushed my mpg and a 1/4 tank.
FTE Legend
Joined: Mar 2017
Posts: 31,874
Likes: 9,171
From: Western NY
2016 mainly highway miles no recent towing, regens always 500 miles apart. Most recent regen lasted 50 miles. Of course after a 1.5 hour drive, it started the second I pulled into a parking lot. Shut it down right away bc i don't care anymore..... Anyway after a day trailriding, the truck immediately starts exhaust cleaning on the journey home. 15 miles on twisty country roads so exhaust took forever to warm up, dpf % didn't change. Once cruising 75mph on the interstate it started going down. Hope it's not a sign of future issues. Crushed my mpg and a 1/4 tank.
..... Anyway after a day trailriding, the truck immediately starts exhaust cleaning on the journey home. 15 miles on twisty country roads so exhaust took forever to warm up, dpf % didn't change. Once cruising 75mph on the interstate it started going down. Hope it's not a sign of future issues. Crushed my mpg and a 1/4 tank.
Mountain Pass
Joined: Jan 2022
Posts: 136
Likes: 113
From: Driving
So you mean you were driving the trails in the Super Duty? If so, I'm thinking all those slow speeds and crawling really loaded up the DPF... SL % won't drop until ETGT4 gets up there some... BTW, how many miles on the truck? A Banks iDash or similiar monitor does wonders to let you know when an active regen is imminent.
FTE Legend
Joined: Mar 2017
Posts: 31,874
Likes: 9,171
From: Western NY
Hotshot
Joined: Jul 2013
Posts: 14,266
Likes: 2,186
Regen fools gold
I was driving along and my soot level started to slowly tick backwards from 36% , 35%, 34%, 33%, and finally by the time I parked it was 32%. I started to theorize why suddenly the truck passive regens.
the next day, I started the truck and the soot level was 42%
so I’m now concluding. …the reduction in soot was really just a reduction In back pressure and that was due to a hot dpf vs a warm one vs a cold one.
so some of these passive regen reports are false and actually differences in back pressure with the same soot load.
the next day, I started the truck and the soot level was 42%
so I’m now concluding. …the reduction in soot was really just a reduction In back pressure and that was due to a hot dpf vs a warm one vs a cold one.
so some of these passive regen reports are false and actually differences in back pressure with the same soot load.
FTE Legend
Joined: Mar 2017
Posts: 31,874
Likes: 9,171
From: Western NY
I was driving along and my soot level started to slowly tick backwards from 36% , 35%, 34%, 33%, and finally by the time I parked it was 32%. I started to theorize why suddenly the truck passive regens.
the next day, I started the truck and the soot level was 42%
so I’m now concluding. …the reduction in soot was really just a reduction In back pressure and that was due to a hot dpf vs a warm one vs a cold one.
so some of these passive regen reports are false and actually differences in back pressure with the same soot load.
the next day, I started the truck and the soot level was 42%
so I’m now concluding. …the reduction in soot was really just a reduction In back pressure and that was due to a hot dpf vs a warm one vs a cold one.
so some of these passive regen reports are false and actually differences in back pressure with the same soot load.
Driving home (altitude climbs, engine works harder, DPF gets hotter) so iDash reduces some or sometimes just stays the same number for SL %.
This has to mean something because it makes sense that soot will increase when the filter is cooler and not increase or even reduce a little when hotter.
As to seeing it increase or even decrease (the iDash) on the next day, that I have not seen.
What I have seen is the truck SL % decrease by 5% the next day (after an active regen) once it cools and is cold when started the next day. But it usually climbs back up 5% fairly quickly after that.
FTE Legend
Joined: Mar 2017
Posts: 31,874
Likes: 9,171
From: Western NY
I may go out after the Bills game....
Last edited by Overkill2; Nov 13, 2022 at 03:52 PM. Reason: edit post
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