6.4L Power Stroke Engine and DrivetrainDiscussion of the 6.4L Power Stroke diesel engine and drivetrain in the 2008 Super-Duty trucks. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 6.4L Power Stroke engine.
I have all of the latest and greatest flashes, so I know when my truck goes into regeneration. The harder I work the truck, the more it regens, whether I'm towing, loaded, or empty.
I think passive regens are an urban legend!
Shawn
__________________ 2008 F-450 JOB-1, 4 X 4 with 4.30's, auto with manual transfer case with factory cup holders. All options except sunroof and nav. Line X with Extra. 24K Draw-Tite Signature Series Fifth Wheel Hitch. 65 Gallon KSH Marine fuel/tool combo in bed. Viair 480C compressor with 8 gallon tank. Hadley Air Horns hooked up to Auto Mate alarm. Chime/Light Killer Mod. Polished Job-1 exhaust tips. Transmission upgraded to JOB-2 filter, pan, and lines. External filter eliminated. PICTURES
a passive regen means it regens while driving and doesnt overtly effect the truck, as opposed to active regen at idle(or so i was told)
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a passive regen means it regens while driving and doesnt overtly effect the truck, as opposed to active regen at idle(or so i was told)
I hear you and I was told the same thing. I'm calling B/S on what we've been told. The more I pour the "coal" to it the more it regens. As I stated above, the harder the truck works, the more regens I have.
Shawn
__________________ 2008 F-450 JOB-1, 4 X 4 with 4.30's, auto with manual transfer case with factory cup holders. All options except sunroof and nav. Line X with Extra. 24K Draw-Tite Signature Series Fifth Wheel Hitch. 65 Gallon KSH Marine fuel/tool combo in bed. Viair 480C compressor with 8 gallon tank. Hadley Air Horns hooked up to Auto Mate alarm. Chime/Light Killer Mod. Polished Job-1 exhaust tips. Transmission upgraded to JOB-2 filter, pan, and lines. External filter eliminated. PICTURES
I have all of the latest and greatest flashes, so I know when my truck goes into regeneration. The harder I work the truck, the more it regens, whether I'm towing, loaded, or empty.
I think passive regens are an urban legend!
Shawn
I think with the latest greatest flashes Ford reset the parameters/thresholds for passive regens. I notice them less and less. It is the active regens at idle that are a thing of the past!
I have all of the latest and greatest flashes, so I know when my truck goes into regeneration. The harder I work the truck, the more it regens, whether I'm towing, loaded, or empty.
I think passive regens are an urban legend!
Shawn
The thing here is a matter of definition. Active regen is when the PCM commands excess fuel into the DPF to burn out the soot. When the engine is operating at a level where there is less oxygen than fuel, it will soot. (heavy load with low boost for the engine rpm and load) So when you have your foot in it hard, it is going to active regen more, because more soot means more plugging and more of the PCM stepping in and doing something about it. Passive occurs at mid level loads where there is a surplus of air and still enough exhaust heat to burn off the soot. The PCM has nothing to do with it.
Basically there is a fine line between right foot positions where too little or too much will lead to more active regens. But when baby bear is just right....
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Dad always said,"Knowledge is limited but stupidity knows no bounds."
The thing here is a matter of definition. Active regen is when the PCM commands excess fuel into the DPF to burn out the soot. When the engine is operating at a level where there is less oxygen than fuel, it will soot. (heavy load with low boost for the engine rpm and load) So when you have your foot in it hard, it is going to active regen more, because more soot means more plugging and more of the PCM stepping in and doing something about it. Passive occurs at mid level loads where there is a surplus of air and still enough exhaust heat to burn off the soot. The PCM has nothing to do with it.
Basically there is a fine line between right foot positions where too little or too much will lead to more active regens. But when baby bear is just right....
This is where I have to disagree. The original explanation of a passive regeneration was to work the motor hard enough to get the exhaust hot enough to burn the particles out of the DPF. When you do this, you create more soot even at "mid level loads." That's a given. If you drive as you suggest, you are creating less soot and the exhaust will never get hot enough
Maybe someone can tell us what the exhaust temperatures run during an active regeneration. I would think for a passive regeneration to burn off the soot particles, the exhaust temperatures would have to be very close to the exhaust temperatures during an active regeneration. That is simply not going to happen
Shawn
__________________ 2008 F-450 JOB-1, 4 X 4 with 4.30's, auto with manual transfer case with factory cup holders. All options except sunroof and nav. Line X with Extra. 24K Draw-Tite Signature Series Fifth Wheel Hitch. 65 Gallon KSH Marine fuel/tool combo in bed. Viair 480C compressor with 8 gallon tank. Hadley Air Horns hooked up to Auto Mate alarm. Chime/Light Killer Mod. Polished Job-1 exhaust tips. Transmission upgraded to JOB-2 filter, pan, and lines. External filter eliminated. PICTURES
I had an active regeneration yesterday. According to my EVO monitor, the EGT in town were running about 700-800, once I got on the interstate and above 50-mph the
EGT shot up to 1100-1200, even though the boost levels were low. On my 04, I would not see those EGT levels unless I was towing the camper with high boost and air conditioning on. It was interesting to note, that I had about 10-15 minutes of in town driving before I could get on the highway, but once I got on the highway, the active cleaning went much quicker due to the higher temps. So, I am thinking anytime I have a regen, to take a quick lap around the beltline to expidite the cleaning process. I wonder if the in town driving with the lower egt's would qualify for a passive regen? This was my first regen as my truck only has 700 miles on it.
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2009 F350 4x4 C.C./L.B.- 6.4 Auto...lots of options, more on the way
Maybe someone can tell us what the exhaust temperatures run during an active regeneration. I would think for a passive regeneration to burn off the soot particles, the exhaust temperatures would have to be very close to the exhaust temperatures during an active regeneration. That is simply not going to happen
UM . . . NO! 1000-1100 is more like it. No OEM is going to subject the turbos to that kind of abuse, you'll only see those numbers in full out race trucks. It wasn't that many years ago that EGT's 1200 degrees would run the risk of melting parts on turbo Diesels.
I am by far not a mechanic or some guru on diesels, but my 2008 6.4 job 1 last week went into a regen, it told me on the message center: cleaning exhust filter and was smokeing even in the city but it had to be over 30 the mileage went dn to around 7.3 mph, but this week the mileage went dn to around 7.8 mph no message was on the dash and it smelled, was this a passive regen oh and the idle was high when in park.
I am by far not a mechanic or some guru on diesels, but my 2008 6.4 job 1 last week went into a regen, it told me on the message center: cleaning exhust filter and was smokeing even in the city but it had to be over 30 the mileage went dn to around 7.3 mph, but this week the mileage went dn to around 7.8 mph no message was on the dash and it smelled, was this a passive regen oh and the idle was high when in park.
Do you have the latest flash like I do? It's the one they stopped doing. The "CLEANING EXHAUST FILTER" stays on in the message center the entire time unless you hit reset.
It sounds like you have an older flash. The "CLEANING EXHAUST FILTER" message only stays lighted for a couple of seconds. Is it possible you could have missed it? With the high idle in park, it sounds like your truck was in an "active regeration" and not a "passive regen."
With the older flash where you could have missed the "CLEANING EXHAUST FILTER" in the message center, all you have to do is is hit "SETUP" and then "RESET." This will run a check at it will show if you are in an "active regeration."
IMHO I think a so called "passive regeration" is a fable, urban legend, or a very nice bedtime story told to us by mother .
Shawn :smokin"
__________________ 2008 F-450 JOB-1, 4 X 4 with 4.30's, auto with manual transfer case with factory cup holders. All options except sunroof and nav. Line X with Extra. 24K Draw-Tite Signature Series Fifth Wheel Hitch. 65 Gallon KSH Marine fuel/tool combo in bed. Viair 480C compressor with 8 gallon tank. Hadley Air Horns hooked up to Auto Mate alarm. Chime/Light Killer Mod. Polished Job-1 exhaust tips. Transmission upgraded to JOB-2 filter, pan, and lines. External filter eliminated. PICTURES
Passive regeneration will most definitely occur but VERY few of us work our trucks hard enough to make it happen. To get EGT's to 1000+ degrees for 5-10 minutes is a fairly hard pull. I've done it on my F450 but I was at 35,500 lb. GCVW at the time. That day of pulling I completely missed my regular, like clockwork, regen.
Passive regeneration will most definitely occur but VERY few of us work our trucks hard enough to make it happen. To get EGT's to 1000+ degrees for 5-10 minutes is a fairly hard pull. I've done it on my F450 but I was at 35,500 lb. GCVW at the time. That day of pulling I completely missed my regular, like clockwork, regen.
What build is your truck? When you have a "regeneration," does the message center stay lit with the "CLEANING EXHAUST FILTER" message? Could you have missed the message for "regeneration?" If you go back to my very first post, when I pull hard and I get regular "regenerations." They are to close together to allow for a "passive regeneration." Until I got the latest flash, I believed in the "passive regeneration." I no longer believe this. In fact, it's a real eye opener to see how much the truck does go into "regeneration."
Shawn
__________________ 2008 F-450 JOB-1, 4 X 4 with 4.30's, auto with manual transfer case with factory cup holders. All options except sunroof and nav. Line X with Extra. 24K Draw-Tite Signature Series Fifth Wheel Hitch. 65 Gallon KSH Marine fuel/tool combo in bed. Viair 480C compressor with 8 gallon tank. Hadley Air Horns hooked up to Auto Mate alarm. Chime/Light Killer Mod. Polished Job-1 exhaust tips. Transmission upgraded to JOB-2 filter, pan, and lines. External filter eliminated. PICTURES
"Passive regen happens whenever exhaust temps exceed approx. 1,076 degrees F without a fuel consumption penalty. Active regens occur when the DPF sensor triggers a burn off and requires the engine to force higher exhaust temps, 1,076 to 1,200 degrees F." This is out of Diesel Power Mag., from the mouth of Charlie Freese a GM duramax engineer. I'm guessing our motor is close to the same.
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Passive Regeneration -- Urban Legend?
2008 F-450 JOB-1, 4 X 4 with 4.30's, auto with manual transfer case with factory cup holders. All options except sunroof and nav. Line X with Extra. 24K Draw-Tite Signature Series Fifth Wheel Hitch. 65 Gallon KSH Marine fuel/tool combo in bed. Viair 480C compressor with 8 gallon tank. Hadley Air Horns hooked up to Auto Mate alarm. Chime/Light Killer Mod. Polished Job-1 exhaust tips. Transmission upgraded to JOB-2 filter, pan, and lines. External filter eliminated.
Look at my original post.
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