Good morning gentlemen,

I have a 2017 f350 6.7 ccsb 4 x 4 which is used as a work truck in the mountains of NC; not a great deal of towing but when I do tow it is steep and at low speed with equipment; i.e. work trailers, etc.

The exhaust filter gauge has been activated through Forescan; thank you to all who have provided info on Forescan as it was invaluable for learning how to adjust my truck.

I was on the road yesterday and watching a regen start and move slowly down in 5% increments; as I got to somewhat stop and go traffic the regen stopped at 20% and then finally briefly dropped to 15%. The regen clearly stopped at that point and when I shut the truck down, the exhaust gauge remains at 20%.

I have also had a regen stop at 30% but this occurred when the truck was shut off; I can only infer that a regen will not start back up once the vehicle has been shutoff prior to completion.

My question is whether a regen stopping above 0% is normal or is this any cause for concern.

I do understand that there are passive regens and active regens and in my understanding, what I witnessed was an active regen.

Thanks in advance your time and I appreciate all the information that is provided on this site.

 

I have that dpf% gauge enabled as well. I also have an Edge monitor. I can tell you that dpf% gauge in the truck is vague at best. It never agrees with my Edge. Also if you tow alot and get a passive regen you can throw the % out the window because it will revert to the soot level or mileage. The best way to know for sure is to monitor exhaust temps.
My truck rarely goes to zero on % or 0 on soot level after a regen, even me driving until I know its done. Usually % is 5-10 and soot around .9-1.2 gpl. Hope this helps.

 

The Ford screen usually drops to 15% as the lowest s reported on the 2011-2016 SD. A limited.......very limited number of people have reported the Ford display going to 0%. I have never seen my 2015 go below 15%. The readings you are seeing are normal, so do not worry.

The add on tuners/monitors/TorquePro/FORScan are computed displays so they go to 0%. My Edge CTS stops at 100% when the Ford display is maybe 80 to 85 % and goes blank if you stop the engine. It will not read again till their computed value drops below 100%.

 

Driving my 2012 today the exhaust filter screen went from 95 to 100%. I decided to take a drive down 101 to Port Angeles and shifted to 4th gear to raise the rpm as the drive is only about 15 miles. The screen went in 5% increments all the way back to 0% then driving stop and go to get propane and groceries is back at 10% by the time I got back home. Nice to have the screen to watch the system in action.

 

My %DPF rarely regens below 30% and often 40% is where it stops. However, I use the Everburn fuel additive and my Edge CTS shows DPF Load and Soot Levels at historic lows. My regens are typically at 500 mile intervals. Since I began using Everburn, I have seen regens start with %DPF at 90 and 95%. Prior, it typically started a regen at Exhaust Filter Full, but a little more often than 500 miles.

 

OP, what you saw is normal. My screen shows regens taking me down to 30% usually. Occasionally I'll get it down to 20 or 15% if I'm working it hard during a regen. Cutting the truck off or putting it in park stops the regen until you get back up to 100%.

 

My 16' regens down to 30% nearly everytime. If I shut the truck off just after regen is complete, at the next startup it will display 25%. I've seen 20% only one time. I got stuck in stop and go traffic about half way through a regen once and it only went to 50%. I assume the egt temps could not remain high enough to continue the regen during the heavy traffic/idling so the computer stopped the process.

Has anyone monitored the mileage between 95% and Exhaust Filter Full? Pulling my 7k trailer around town I get a regen at 35 miles after the screen hits 95%. Unloaded on the highway it made 40 miles before the regen started. It helps plan a highway trip just prior to regen if I know the exact mileage a regen will start. I start watching the exhaust filter percent at 90% and take note of the mileage when 95% pops up and hope to be starting a trip or heading back home on the highway in 35 miles. It bugs the heck out of me when a regen starts 3 miles from the house and parking the truck at 95%

 

Regen occurs 2011 to 2015 as stated below from Diesel Supplement Manual...

Regeneration of the diesel particulate filter occurs automatically during operation above 30 mph (48 km/h) and requires no actions from the driver.

Regen for the 2016 occurs as stated below from the Diesel Supplement Manual...

Regeneration of the diesel particulate filter occurs automatically during operation above 4 mph (7 km/h) and requires no actions from the driver.

The Jackhammering TSB might have changed the speed for the 2011-2015's. I have not verified this nor have I seen anyone stating that the speed has changed from 30 mph to 4 mph with this TSB

 

My '15 truck behaves pretty much exactly as the OP says. Starts regen at 100% on the screen, ends at 20-25%, then continues down to 15-20% before beginning to climb again. If I shut down the truck before the regen in complete, it will not start up again immediately, but will wait until it is once again at 100%.

I've been using Enerburn lately, and the interval between regens has increased, but not to 500 miles yet. Enerburn does seem to make the disparity between what the dash gage says and what Forescan says bigger - so the algorithms in use in the dash gage do not anticipate the use of Enerburn.

 

Thank you for taking the time to respond; a little clarification goes a long way to alleviating needless worry.

When I activated the dpf gauge with Forescan, I do remember wondering how accurate the gauge would actually be.

Thank you again.

 

I would rely on the Ford display being more accurate than FORScan, TorquePro or even the tuner/monitors.

You can bet when the Ford display hits 100%, shortly you will do a regen.

But, remember Ford has limited the distance between regens to 500 miles since last regen finished. So, in theory and I have seen it, if you are towing and having passive regens, you can get an active regen when the exhaust filter percentage is any value less than 100%.