Regens can pause
Thread Starter
|
Senior User
Joined: Aug 2011
Posts: 146
Likes: 0
Regens can pause
I noticed something new this morning. The 'cleaning exhaust filter' advisory appeared about a minute before I exited the highway and pulled into a fast-food drive through (perfect timing, how does the truck know when the worst time is?). Initially my avg mileage was dropping rapidly - as one would expect because I was stopped at idle and throwing extra fuel at the regen. The drive through line was a little slow and after a few minutes I noticed that the avg milage was no longer dropping like a stone, but rather at a rate more consistent with idle. I wondered if the regen had stopped, or possibly completed. A few minutes later, as I was pulling away from the restaurant, the 'cleaning exhaust filter' message came on again and I noticed the usual drop in instant mileage for about the normal length of time.
So, this leads me to believe that the truck will stop/pause a regen under certain conditions other than the obvious condition of turning off the engine. Has anyone else noticed this?
MA
So, this leads me to believe that the truck will stop/pause a regen under certain conditions other than the obvious condition of turning off the engine. Has anyone else noticed this?
MA
Postmaster
Joined: Sep 2006
Posts: 2,598
Likes: 5
From: Maryland
I haven't paid close attention to how it acts with the truck still in gear and not moving, but as soon as you put the truck in park, active regen shuts down. The exhaust temp will still stay high enough to still be cleaning the filter for a few minutes, but it stops adding fuel when the truck is in park. During my next regen I will pay closer attention and see if it pauses if I stop and keep the truck in gear.
Post Fiend
Joined: Apr 2004
Posts: 5,158
Likes: 35
From: North of Salt Lake City
I haven't paid close attention to how it acts with the truck still in gear and not moving, but as soon as you put the truck in park, active regen shuts down. The exhaust temp will still stay high enough to still be cleaning the filter for a few minutes, but it stops adding fuel when the truck is in park. During my next regen I will pay closer attention and see if it pauses if I stop and keep the truck in gear.
Senior User
Joined: Dec 2010
Posts: 277
Likes: 0
Exactly what EDGE CTS parameters identify when a regen is going on.
Are there two types of regenerations, i.e. a partial and a full?
thanks ken
Are there two types of regenerations, i.e. a partial and a full?
thanks ken
Post Fiend
Joined: Apr 2004
Posts: 5,158
Likes: 35
From: North of Salt Lake City
I think the key as to when an active regen starts is based on the dpf back-pressure reading.
Postmaster
Joined: Sep 2006
Posts: 2,598
Likes: 5
From: Maryland
There's been plenty of discussion on this recently. PaintedHorse has a good thread here: https://www.ford-trucks.com/forums/1...-on-regen.html
I think the key as to when an active regen starts is based on the dpf back-pressure reading.
I think the key as to when an active regen starts is based on the dpf back-pressure reading.
Lead Driver
Joined: Jan 2010
Posts: 6,600
Likes: 84
Trending Topics
Post Fiend
Joined: Apr 2004
Posts: 5,158
Likes: 35
From: North of Salt Lake City
Regen seems to be activated based on soot concentration. The CTS can also monitor DPF backpressure, but that number fluctuates wildly. I have not been able to correspond a backpressure reading to regen at all. Soot concentration of 2.66 g/ml if the engine is up to temperature or higher readings if a regen was interrupted and the next startup is after a cold soak. With the CTS you will also notice that active regen starts up to one minute before the dash notification message appears.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
Postmaster
Joined: Sep 2006
Posts: 2,598
Likes: 5
From: Maryland
Curious as to how the soot concentration is measured. I figured it would be based on back-pressure. Perhaps the pressure reading is averaged over some period of seconds or minutes to come up with a more steady reading? I'm sure I'm wrong but still curious.
Lead Driver
Joined: Jan 2010
Posts: 6,600
Likes: 84
I will say, I tried to catch cardboard on fire at the exhaust tips with 1,400 RPM and 1,100 degrees EGT post DPF and I couldn't do it.
I grow pine trees so I always park on the road so I'm sure you guys have a good reason for driving in your fields.
Trees are a bit more difficult to drive over when they're alive.
Lead Driver
Joined: Jan 2010
Posts: 6,600
Likes: 84
I always thought 35 MPH but I'm almost certain I had one start at 30 MPH the other day.
Cross-Country
Joined: Sep 2011
Posts: 52
Likes: 0
From: SC Kansas
These trucks are hot to begin with but if you're driving your truck in a place where it can threaten crops (fire), $450 for the Insight CTS might be money well spent in compairson to know EGTs.
I will say, I tried to catch cardboard on fire at the exhaust tips with 1,400 RPM and 1,100 degrees EGT post DPF and I couldn't do it.
I grow pine trees so I always park on the road so I'm sure you guys have a good reason for driving in your fields.
Trees are a bit more difficult to drive over when they're alive.
I will say, I tried to catch cardboard on fire at the exhaust tips with 1,400 RPM and 1,100 degrees EGT post DPF and I couldn't do it.
I grow pine trees so I always park on the road so I'm sure you guys have a good reason for driving in your fields.
Trees are a bit more difficult to drive over when they're alive.
Its more for driving through stubble while harvest is going on. Another good reason to do a little lift and put some 35's on it.
Postmaster
Joined: Sep 2006
Posts: 2,598
Likes: 5
From: Maryland
I have yet to see regen stop because the truck slowed below a certain speed. As I stated before, I have never seen it stop because I was stopped at a traffic signal either, but within 10 seconds of putting it in Park, active regen stops. This is all verified through the Edge CTS which positively indicates when the regen is active.