Regen problem

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Dec 24, 2024 | 11:30 AM

#16

Jmcx1969

Cross-Country

Joined: Jan 2023

Posts: 62

Likes: 22

I live in a cold climate. What I've noticed on my 17 via Forscan is that when the weather is well below freezing the EGR is never commanded open. The valve sits at 4% which is the lowest it ever is so I assume closed.

No EGR means much less soot production and very long time to fill DPF. I recently went 3000 miles on a regen and the current one was getting there too but we had a warm spell and things accelerated.

Dec 26, 2024 | 12:58 PM

#17

acdii

Lead Driver

Joined: Feb 2022

Posts: 7,946

Likes: 4,037

Quote:

Originally Posted by Jmcx1969

Thats not what the EGR does. The soot comes from the cylinders as fuel is burned, the EGR takes that soot from the exhaust pre-turbo and feeds it back into the intake, it does not produce more soot. By not contributing exhaust gases to the intake, its keeps the intake a bit cleaner, but does not add anything to the exhaust.

Dec 26, 2024 | 02:33 PM

#18

Jmcx1969

Cross-Country

Joined: Jan 2023

Posts: 62

Likes: 22

Quote:

Originally Posted by acdii

I disagree. The purpose of EGR is to bring CO2 back around to the intake and lower the O2 concentration. This lowers NOX but increases soot production.

Anyway, this is just what i have observed. I don't know why the engineers turn off the EGR in cold weather but i see the affect.

Dec 26, 2024 | 05:35 PM

#19

augam

More Turbo

Joined: Jun 2023

Posts: 590

Likes: 249

I just bought the IDash couple weeks ago. What I noticed is the Banks gauge tracks DPF % with more precision - I think. The Banks will say 40% Ford display says zero. Banks gets to about 80 or 90% Ford display reads 60%. Once the Banks gauge hits 100% I initiate the Regen from the display. 20 minutes later Banks goes to ~6% Ford display reads 0%. EGTs settle back down and on I go.

All moderate to heavy highway driving with truck camper in the bed and 6500lb boat in tow. ~10 -11mpg running 65mph over 1500 miles.

Dec 26, 2024 | 06:07 PM

#20

Jmcx1969

Cross-Country

Joined: Jan 2023

Posts: 62

Likes: 22

With Forscan i can monitor three different DPF percentages. One appears to increment purely on distance driven (left to its own devices the truck will regen every 800km (496 miles) no matter the actual soot load). The second increments with actual soot load and 100% is at a preferred maximum level. The truck will say 'filter full' when this happens. The third also increases with soot level but slower than the second. Possibly an absolute limit. The truck says 'filter overloaded' when this one is 100%

I've pushed it to overloaded a couple times just to see what happens.

Jan 8, 2025 | 03:54 PM

#21

BadDogPSD

Laughing Gas

Joined: Dec 2005

Posts: 1,087

Likes: 189

From: Reno, NV

Quote:

Originally Posted by BadDogPSD

Interesting. I have the opposite issue, I'm at 70% and it hasn't gone down despite two active regens.

Thought I'd update this- My truck did a regen last night and I drove until it completed, dpf% stayed at 70%. I put new batteries in (passenger side was
leaking) and when I started the truck, the Edge CTS3 showed dpf% at 23%. So I'm thinking my bad battery made it appear that I had an issue when
I really didn't. I didn't notice any other issues that some report when their batteries starting going bad other than the charge voltage has dropped off
quite a bit.

Jan 12, 2025 | 05:34 PM

#22

tricountytrail

Trailering

Joined: Feb 2017

Posts: 24

Likes: 1

From: Pendleton

Quote:

Originally Posted by 4wd6.7L

It will let you know if there is a problem. Do you live in a cold area? I don't, but have heard that the DPF% can remain low for extended periods in cold climates.

I second this drove 500 miles 15 degrees f DEF gage didn't move and exhaust DPF percent from 80 % to 0% no regen. And I was pulling a 6000 lbs on thruway.