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Old 04-29-2016, 06:39 AM   #31
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Originally Posted by bigfoot View Post
.

Frequency of regen depends on the load on the engine...more load, more soot so the dpf needs cleaning more often. My F250 will regen about every 100 mi when towing our fiver, esp in the mountains. Not towing, it'll go 150 to 200 mi or more. Regens last about 15-20 miles at highway speeds, longer for slower speeds. I've read it uses about two gal of fuel for a regen but I don't know if that's true.
Are you sure about this? I ask because I drive a fire truck for a living and it sure seems to be the opposite. We had trucks without def fluid that needed to be regened, and it was certainly the opposite. If you where at a hall that had long fast runs and you worked the engine regen frequency was greatly reduced. Down town where you can never get rpm's up for very long, we needed to manually regen all the time. That being said, our new trucks with the def fluid never have to be manually regened. So maybe a completely different set up. Thanks
And for the record, if the def fluid is what deters you from owning a diesel, I've heard some people say, you are either full of it or lazy as ****. It's like filling up windshield wiper fluid every now and then. Not a big deal!
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Old 04-29-2016, 07:25 AM   #32
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I own a 2015 Ram 2500 with the 6.7 L engine. Sounds like most of you know when your engine is in regen mode. I cannot tell when my Ram is in this mode. I can see Ford when it is bellowing the black smoke, is in regen mode, at least the older models. What do I look for to know when the Ram is in Regen mode. I do run the auto exhaust brake most of the time and for the life of me, I can't tell when it is in regen mode. I do know that it takes along time for the DEF fluid to get down low. What should I be looking for???
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Old 04-29-2016, 07:34 AM   #33
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My 2016 Ford tells me it is regen mode on the dash. No black smoke no matter how hard I push it.

I moved from a gas to diesel and I will never go back while owning a travel trailer. Put the cruise on 65 and enjoy the trip.


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Old 04-29-2016, 12:10 PM   #34
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Originally Posted by canadiankid View Post
Are you sure about this? I ask because I drive a fire truck for a living and it sure seems to be the opposite. We had trucks without def fluid that needed to be regened, and it was certainly the opposite. If you where at a hall that had long fast runs and you worked the engine regen frequency was greatly reduced. Down town where you can never get rpm's up for very long, we needed to manually regen all the time. ...
My F250 does not use DEF so I don't know what affect that has. I do know that when on the highway at a constant speed on fairly flat roads it takes about 15 miles for the regen to finish, towing or not. When we tow in mountains on the way to our favorite campground there's lots of steep upgrades & downgrades, fast & slow, and it'll take up to 40 miles for the regen to finish. I think it's because the exhaust temp varies quite a bit, going way down on downgrades, where we're essentially coasting with the throttle closed, to way up on the slow steep upgrades. It has to attain a certain exhaust temp for the regen to work, if it get's to low it can't burn the soot. Also, on the upgrades where it's loaded the engine will generate more soot that has to be burned off. There's no way to manually trigger a regen on my truck (I wish there was). I suspect your fire truck uses different parameters for the regen, it has quite a different usage profile than a general use pickup truck.
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Old 04-29-2016, 12:16 PM   #35
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Originally Posted by Treatcg View Post
My 2016 Ford tells me it is regen mode on the dash. No black smoke no matter how hard I push it.

I moved from a gas to diesel and I will never go back while owning a travel trailer. Put the cruise on 65 and enjoy the trip.
Yep, that's the point of the DPF, all the soot (black smoke) is filtered out...it's still being generated but it's trapped in the DPF. If you get black smoke from a truck with a DPF, there's something wrong. Your tailpipe will always be nice & clean, too. Mine looks like new, not a trace of soot. The exhaust doesn't even smell like a 'normal' diesel either.

I agree about towing with a diesel...we just smile & wave when we pass those gassers laboring up the mountain grades.
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Old 04-29-2016, 05:41 PM   #36
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Originally Posted by namusmc65 View Post
I own a 2015 Ram 2500 with the 6.7 L engine. Sounds like most of you know when your engine is in regen mode. I cannot tell when my Ram is in this mode. I can see Ford when it is bellowing the black smoke, is in regen mode, at least the older models. What do I look for to know when the Ram is in Regen mode. I do run the auto exhaust brake most of the time and for the life of me, I can't tell when it is in regen mode. I do know that it takes along time for the DEF fluid to get down low. What should I be looking for???
If you listen close at a hot idle, can you hear your def injecter clicking?

Thats the only taddle tale I've found on my 2013 ram. If the def injector is clicking like crazy, its in regen mode. You can also smell it in slow traffic if you pay attention....it smells similar to a really hot wood heater to me. Normal hot idle the def injector clicks every 3-5 seconds.

I've herd the def injectors are quiter on the newer trucks....so you may not be able to hear it.
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Old 04-30-2016, 11:59 AM   #37
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Originally Posted by namusmc65 View Post
I own a 2015 Ram 2500 with the 6.7 L engine. Sounds like most of you know when your engine is in regen mode. I cannot tell when my Ram is in this mode. I can see Ford when it is bellowing the black smoke, is in regen mode, at least the older models. ...
Uhh...no. If a truck with a DPF is 'bellowing' black smoke at any time, there's a major problem somewhere. That's the function of the DPF...to filter out the smoke. My F250 has never emitted the slightest wisp of smoke, black or otherwise. When it starts the regen it will display a message about cleaning the exhaust filter but it's only displayed for a few seconds and easy to miss. I have an Insight Edge monitor to display more info, mostly temps, but it will also indicate when it in regen.
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