Exhaust Cleaning
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Junior User
Joined: Nov 2010
Posts: 78
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From: Illinois
Exhaust Cleaning
I had my first exhaust cleaning yesterday at 865 mi and I have a question.
How long does it normally last? I was on the interstate at 70mph for approx 15 more min before shut down and the mpg never came back up. It dropped about 4mpg after the message.
Also, am I crazy or did I see a reduction in the MTE and a drop in the guage before my lying eyes at the start of the cycle.
There was a noticeable sound change in the purr of the engine
How long does it normally last? I was on the interstate at 70mph for approx 15 more min before shut down and the mpg never came back up. It dropped about 4mpg after the message.
Also, am I crazy or did I see a reduction in the MTE and a drop in the guage before my lying eyes at the start of the cycle.
There was a noticeable sound change in the purr of the engine
New User
Joined: Jan 2011
Posts: 16
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Mine seems to usually last about 10 minutes. I wish they'd have a notification pop up when it completes like it does when it starts. Perhaps they could even do better and have a way to check current status because it's very easy to miss the pop-up notification that exhaust cleaning has started.
Postmaster
Joined: Apr 2009
Posts: 3,839
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The more you drive your new trucks, you will soon learn that the regeneration process is a non-event. They tell me there is a "drive to complete exhaust filter cleaning" message. I have never seen this message in 22000 miles. I have seen the other message but can absolutely say I have missed more than I have seen.
I use the truck as a daily driver. Local or long distance, does not matter. The regens I have noticed last about 10 minutes.
Regards
I use the truck as a daily driver. Local or long distance, does not matter. The regens I have noticed last about 10 minutes.
Regards
Lead Driver
Joined: Jan 2010
Posts: 6,600
Likes: 84
I have never had the "drive to clean" message either but if I had to guess, I was getting close for the first time this week.
I know my truck had been trying to regen since Wednesday or Thursday.
I drove it a little today on the highway and that took care of what it needed to do.
It must take a lot of incomplete cycles to create a need for that message.
I know my truck had been trying to regen since Wednesday or Thursday.
I drove it a little today on the highway and that took care of what it needed to do.
It must take a lot of incomplete cycles to create a need for that message.
Postmaster
Joined: Apr 2009
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I agree. I noticed this winter, with the shorter drives, I can smell the soot incineration if I stop the truck and it is regenerating. I did go 3 stops like this before I took my weekly trip to see my mom. That 50 mile one way makes the truck happy. I have not smelled the soot burning since.
Senior User
Joined: Oct 2008
Posts: 180
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The engine will sound different than normal. Highway driving at stable speed seems to be the fastest way for it to complete the cycle. Put the info center on the fuel mileage setting and change it to update every 1 minute. It will be very obvious when it completes as the mpg will jump back up. I agree - there should be a message when the cycle completes.
Junior User
Joined: Feb 2011
Posts: 99
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From: Champlin,MN
Probably a stupid question but i have had a couple of the cleaning exhaust messages come up but is this the same as a regen or will there be a different message and will there be a message to tell you its complete cause i have not seen one on the cleaning exhaust, my older diesels have never had this so its new to me!!
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Lead Driver
Joined: Jan 2010
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Likes: 84
Probably a stupid question but i have had a couple of the cleaning exhaust messages come up but is this the same as a regen or will there be a different message and will there be a message to tell you its complete cause i have not seen one on the cleaning exhaust, my older diesels have never had this so its new to me!!
The message "cleaning exhaust" is the same as regeneration (regen as we call it).
This has to do with the DPF.
There is not a message when it is complete.
The more you drive the truck, the more you will learn about your truck.
The instant MPG graph is the best way.
I can also tell by the tone of the engine.
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Postmaster
Joined: Apr 2009
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I guess my 59 year old ears do not hear as well as some of you guys. I can not tell when my truck goes into regen when rolling down the road. I also have not seen a 1 minute update rate for my info center on instant mileage. Maybe my sight is failing too...if I was a horse, would you shoot me?
Tuned
Joined: Feb 2011
Posts: 414
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From: Indian Trail, NC
My truck did its first regen a couple days ago. It had about 280 miles on it. It lasted about 5-10 min. I did notice when I got to where I was going that the exhaust did have a smell to it and was very hot. Other than that, no change in the way the engine sounded and maybe 1 MPG drop.
New User
Joined: Dec 2010
Posts: 14
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Mine has gone into the regen mode twice in the first 900 miles but unfortunately both time I was in town and close to home. I felt it in the engine as it seemed to stall slightly or hickup so I looked down at the informataion center to the regen message was up. In the last 100 or so miles the average mpg dropped about 3-4 mpg according to the computer from 15+ to 11+. Maybe/hopefully getting it out on the road will help get it in to and complete the regen process and my mpg will jump back up.
Senior User
Joined: Oct 2008
Posts: 124
Likes: 2
From: Woodlawn, TN
Maybe another stupid question here, I picked up my new truck about 3 weeks ago, The first 2 meassages were about 400 mi and 800 mi respectively. The third was at 1000 mi and I'm pretty sure it didn't finish the process, since it was only about 3 miles from home. Yesterday it came on again at 1050 miles on the way home. this time I detoured and drove for about 20 min until it seemed to complete. Now the question..does it hurt to not finish? I don't think I will always be able to drive additional miles at speed. Sorry new diesel owner here and don't want to mess anything up.
Postmaster
Joined: Apr 2009
Posts: 3,839
Likes: 2
Unlike the 6.4, the 6.7 is designed to allow shutting off the engine while DPF event is taking place. The truck has an info center message that will tell you to "drive until completed" if you abort too many DPF events before they are completed. I use mine as a daily driver and in 22000 miles I have aborted more than a couple of DPF events with no sign of this "drive" message.
Most of us here with some miles under our wheels have adopted the "non-issue" position on DPF events...and DEF injection as well. We just drive them and smile a lot...
Regards
Most of us here with some miles under our wheels have adopted the "non-issue" position on DPF events...and DEF injection as well. We just drive them and smile a lot...
Regards
Postmaster
Joined: Apr 2009
Posts: 3,839
Likes: 2
AFAIK, yes...I have had up to 3 restarts with my truck without the "drive" message. I truly never could tell when the truck was having a DPF event until this winter. Cold weather with daily remote starts and longer, more frequent periods of idling have provided the environment for more frequent DPF events. I noticed them only by the odor of soot incineration when exiting an idling truck.
After 22000 miles with my truck, I have quit worrying about the DPF, the DEF and hand calculating my fuel consumption. I now concentrate on controlling the ridiculously wide smile I have on my face every time I drive the truck...
Regards
After 22000 miles with my truck, I have quit worrying about the DPF, the DEF and hand calculating my fuel consumption. I now concentrate on controlling the ridiculously wide smile I have on my face every time I drive the truck...
Regards