Is stationary regen more effective than regen while driving?
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Cargo Master
Joined: Apr 2003
Posts: 2,058
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From: Too close to Houston
Is stationary regen more effective than regen while driving?
My '19 used to regen every 500 miles like clockwork. Lately though with just over 14,000 miles on the odometer, I've been seeing regens starting at closer to 200 mile intervals while highway driving unladen. I don't see much difference pulling a 10k 5th wheel either (flat towing Texas coastal plains, no grades more significant than highway overpasses and bridges).
I was wondering if I should initiate a stationary regen. Would this clean the DPF better than the cleaning cycle while driving? That part hasn't changed much that I can tell. It's always taken 20 to 25 miles to regen to an indicated 0% while driving 65 to 75 mph.
I do have an oustanding recall 20E07 for the emmisions system. Should I get than done first?
I was wondering if I should initiate a stationary regen. Would this clean the DPF better than the cleaning cycle while driving? That part hasn't changed much that I can tell. It's always taken 20 to 25 miles to regen to an indicated 0% while driving 65 to 75 mph.
I do have an oustanding recall 20E07 for the emmisions system. Should I get than done first?
Lead Driver
Joined: May 2021
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From: Uh oh, CA
I can't answer for sure since I have always been able to work in an active regen while driving... and I have wondered this too, but I also feel like if a regen is able to fully complete down to 0%, then 0% is 0%. I don't see how it could be less than that...
Saying that, at one point I was towing my camper pretty often for hundreds of miles at a time. My truck pretty much stayed in passive regen while towing, and even though I could go thousands of miles without a regen, I decided to let the truck perform an active regen so it would be happy since it was way past the mileage trigger for a regen. After 700 miles of constant passive regen, and then a full active regen, the DPF% gauge didn't start moving for another 160ish miles... I was actually nervous that something was wrong because it had always started moving much, much sooner than 160 miles! So, maybe there can be a difference... I don't know. I'll look forward to see what others have to say about this too.
Saying that, at one point I was towing my camper pretty often for hundreds of miles at a time. My truck pretty much stayed in passive regen while towing, and even though I could go thousands of miles without a regen, I decided to let the truck perform an active regen so it would be happy since it was way past the mileage trigger for a regen. After 700 miles of constant passive regen, and then a full active regen, the DPF% gauge didn't start moving for another 160ish miles... I was actually nervous that something was wrong because it had always started moving much, much sooner than 160 miles! So, maybe there can be a difference... I don't know. I'll look forward to see what others have to say about this too.
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Cargo Master
Joined: Apr 2003
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From: Too close to Houston
I’ll check the MAP sensor, thanks.
I was reminded of another thing by Chad’s post above. After a regen it will hold at 0% for 60 to 70 miles and then quickly ramp up to full over the next 150 miles or so. Before, I was seeing a 10% increase about every 50 miles.
I was reminded of another thing by Chad’s post above. After a regen it will hold at 0% for 60 to 70 miles and then quickly ramp up to full over the next 150 miles or so. Before, I was seeing a 10% increase about every 50 miles.
Hotshot
Joined: Oct 2015
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From: Wyoming
2017-2019 passive regen seems to work differently than 2020+ passive regen. You won't find many 2017-2019 owners that see the DPF % rollback much. I've seen it exactly once when the exhaust was practically on fire from towing up a steep pass.
Hotshot
Joined: Jul 2013
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noticed the same thing.
on my 2019, on long drives 2 to 3 hrs, I will see some passive towards the end of the trip and only while coasting ….at power never see it.
Lead Driver
Joined: May 2021
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From: Uh oh, CA
On my 22 I have seen it roll back from the 70’s all the way to 0% from passive regens. And like I mentioned, on longer trips it will hit 0% and just stay there. But, I was a little surprised back in November when I towed my camper. It only moved about 5%, however it was a bit colder too so I guess the colder ambient temp helped keep the truck and temps down so it didn’t passively regen like when it was warmer.
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Hotshot
Joined: Dec 2005
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From: Chino Valley, Arizona
here in Az. with the long 5 to 7% grades where elevation changes several thousand feetI build soot fast when towing heavy, I rarely make the 500 mile regen.
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Fleet Mechanic
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I have a '19 also and have not had the emissions recall performed yet either. I don't like the idea of stationary regen, just seems like it's building a whole lot of heat and relying completely on the cooling system to keep up. I'm sure it does just fine, but seems like a lot of unnecessary wear and tear. I'm at 65k miles and, at times, I'll notice my regens seem to be happening more frequently, sometimes they space out to the 500 mile mark. I attribute it to maybe the fuel I got that tank, environmental factors, etc. I've gone through short stretches where regens seem to occur closer to 2-300 miles, but then they'll space back out to 500 miles again. I have never experienced passive regen, even when towing. Unloaded, I'll kick the truck down a gear to keep the RPM's closer to 2k and it helps active regens go quicker.
Lead Driver
Joined: Feb 2022
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My concern would be too much fuel dilution with an idle regen going on, even if the idle is bumped up. The engine is not working, so doesn't produce as much heat to burn off the fuel. A good clean regen needs heat, so the engine needs a load on it to get the raw fuel into the exhaust where it is needed and not washed on the cool cylinders. This is even more important this time of year, my 19 barely touches 190 when driving 60 MPH.
That reminds me, need to get Forscan going and enable passive if I can. I run out of miles long before the soot reaches 70%. Would also like to trigger it at the start of my trip instead of it coming on near the end and not completing.
That reminds me, need to get Forscan going and enable passive if I can. I run out of miles long before the soot reaches 70%. Would also like to trigger it at the start of my trip instead of it coming on near the end and not completing.
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Cargo Master
Joined: Apr 2003
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From: Too close to Houston
Update: My DEF showed full 180 miles after initiating the last regen. That regen took about 22 miles to complete so the filter filled in around 158 miles. After the regen completed I put around 40 miles on it with the filter showing zero. It then ramped up to full during two 50 mile highway trips each starting from a cold start (went to 90% in those 100 miles). The last 10% accumulated in 15 to 20 miles of city driving.
I pulled and cleaned the MAF & MAP. The MAF looked clean and the MAP had what I’d call a very little bit of soot on it. I’ll let it regen on my next highway trip (165 miles) and see how long it takes to fill up afterwards.
I pulled and cleaned the MAF & MAP. The MAF looked clean and the MAP had what I’d call a very little bit of soot on it. I’ll let it regen on my next highway trip (165 miles) and see how long it takes to fill up afterwards.
5th Wheeling
Joined: Sep 2021
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On my 22 I have seen it roll back from the 70’s all the way to 0% from passive regens. And like I mentioned, on longer trips it will hit 0% and just stay there. But, I was a little surprised back in November when I towed my camper. It only moved about 5%, however it was a bit colder too so I guess the colder ambient temp helped keep the truck and temps down so it didn’t passively regen like when it was warmer.
Lead Driver
Joined: May 2021
Posts: 5,818
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From: Uh oh, CA
Not sure what trim you have, but the XL's and XLT's had an option for OCR when ordering them. Regardless, even if you have a higher trim, or (like me) chose not to pay Ford for the OCR feature, it's simple to add via Forscan. This will give you the ability to both, turn your active regen on or off, and it will allow you to see the trucks DPF% reading.
5th Wheeling
Joined: Sep 2021
Posts: 41
Likes: 12
Not sure what trim you have, but the XL's and XLT's had an option for OCR when ordering them. Regardless, even if you have a higher trim, or (like me) chose not to pay Ford for the OCR feature, it's simple to add via Forscan. This will give you the ability to both, turn your active regen on or off, and it will allow you to see the trucks DPF% reading.
Logistics Pro
Joined: May 2011
Posts: 4,832
Likes: 668
From: Maine
Not sure what trim you have, but the XL's and XLT's had an option for OCR when ordering them. Regardless, even if you have a higher trim, or (like me) chose not to pay Ford for the OCR feature, it's simple to add via Forscan. This will give you the ability to both, turn your active regen on or off, and it will allow you to see the trucks DPF% reading.