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REGEN

3K views 28 replies 10 participants last post by  DavidPhillips 
#1 ·
How can you tell when the truck goes into regen? What is regen and how often should it do it?
 
#2 · (Edited)
If your watching the AVG MPG you should notice a drop when regeneration occurs. If it happens when the truck is parked the idle will advance until it is complete or you press the brake to start driving.

Operators manual says the way you drive (loads, speed, distance, etc., etc.) determines how regeneration occurs. Some people may see it a lot and others not so much.
 
#5 ·
How can you tell it's in regen?

Oh you'll know all right - it feels like you hooked onto a 3-bottom plow all of a sudden. If it's daytime you'll see the smoke cloud behind you and if you're quick on the draw and reset your fuel consumption computer you'll find you're getting maybe 3 mpg or less. RPM goes up, engine temp and boost go up - it's quite shocking first time you see it. Fewer emissions my *** - you're burning more fuel, i.e. MORE exhaust out the pipe. No sermons on the type of emissions, please. Carbon is a natural and essential element, CO2 is not a poisonous obnoxious greenhouse causing undesireable - ask any tree, and there's that awful water vapor, the other product of burning any fuel.
 
#6 ·
Oh you'll know all right - it feels like you hooked onto a 3-bottom plow all of a sudden. If it's daytime you'll see the smoke cloud behind you and if you're quick on the draw and reset your fuel consumption computer you'll find you're getting maybe 3 mpg or less. RPM goes up, engine temp and boost go up - it's quite shocking first time you see it. Fewer emissions my *** - you're burning more fuel, i.e. MORE exhaust out the pipe. No sermons on the type of emissions, please. Carbon is a natural and essential element, CO2 is not a poisonous obnoxious greenhouse causing undesireable - ask any tree, and there's that awful water vapor, the other product of burning any fuel.
:clap:well said :hehe:
 
#10 ·
Mine regens for at least 10 munites and up to 20 minutes sometimes every 200 to 300 miles. The intervals are starting to get farther apart.

Some signs of regen: Engine sounds totally different starting out from a stop, elevated idle when in Park, on the highway your boost drops to 0 and it sounds like the waste gate can't make up it's mind what it wants to do, constant hissing. Keep some marshmellows in the truck too, you can roast them during regen. :hehe:
 
#11 ·
10+ minutes sounds like a long time??? As I said, I've only seen mine hit regen a couple of times on the highway, maybe because I stick to the lowest sulfur fuel I can and I use the cetane booster religiously. My regen lasts at the most 2 minutes, and probably less than that. Frequency seems to be maybe once every 3 or 4 tankfuls, and mine is the big tank.:dunno:
 
#12 ·
That's odd. Maybe you have a super secret flash. I don't think 2 minutes would be enough to burn what's in that DPF.

Is there a message in your truck that tells you that you are in Regen? Maybe it only displays for 2 minutes. Maybe you only notice it's in regen during the last part if it.

I am grasping for answers here, cause 2 minutes sounds a little short, but if they fixed it then I want that new flash.

Maybe one of the tech can chime in on this.
 
#14 ·
Just as there appears to be such a huge difference on what owners are claiming for mileage as compared to what I and the people I know with the '08 get (generally lousy), there are probably substantial changes in how each engine will respond the to the zillions of sensory data inputs the PCM receives. I hear the program itself is a monster - millions of lines of code. Add in altitude, weight, tires, road surfaces, driving patterns, weather and so on, I'd expect input/outputs to be variable, not static. Regen times are triggered by a multitude of inputs, so the response will vary, no doubt. Most regeneration processes are terminated by a prime target input, more often than not it's a preset temperature. If driving conditions are so varied, then the time to reach the reset temperatures will be all over the map, dramatically changing the duration of the regen cycle. It's the last few degrees of the cycle that increase at the slowest rate.
On a positive note: I hear that the big 3 are lobbying hard where they can to have the guidelines changed. It's their response to lousy mileage complaints and therefore must be the basis for their argument that I'd guess would be what some of us have been asking all along - if you burn MORE fuel how can you possibly have FEWER emissions? I was told by a dealer who I trust (there actually are such people!) that by next year there should be a drastically different update available for the 6.4 that will specifically address the poor mileage issue. Hopefully it will directly deal with the necessity of, or better the lack of, this awful DPF and all the catalytic garbage with it. For an engine that's designed to be capable of 50 lbs of boost, it NEEDS it. Mine runs, on dry flat pavement, empty truck, between 12 and 16 lbs and that's just to barely maintain highway speed! At 16 lbs of boost, my 6.0 liter would be approaching tire speed rating and still accelerating! I would think that Ford would be leading the pack with the builders of the 6.7 Cummins right there beside them especially considering the takeover of the number 2 position in North America for vehicle sales by Toyota, punting Ford down to #3. Anybody driven an '08 Tundra 4X4? Wow. Beats any half ton I can think of hands down, and power to burn and still hand them all their collective a**** in the fuel consumption department, reasonably same sized engines compared. If they ever make a 3/4 ton with a diesel, look out big 3. If the economic state of the US is gauged by looking at the state of General Motors, then dark days would be ahead.
 
#17 ·
Mine did something different yesterday, while driving I new It was doing a regen but when I came to a traffic light the rpm did not drop so it was like powerbraking at a stop. I was a little freaked at that point but I was turning right and did a cali stop and kept going. after that it acted normal. I'm going to call the dealer on monday to see if they want to look at it.
 
#18 ·
Learn to be a 2 footed driver - it'll drive your wife nuts - if you have an auto tranny. With a standard it's a piece of cake. If you feel the rpm sneaking up on you in that situation go to neutral. Hitting the brake SHOULD stall the regen cycle -if not, complain to your dealer next service. This regen cycle is as I posted not a predictable thing. Maybe it should simply trigger a "regen due" light.
 
#20 ·
Mine just went through one. I let it set and regen, thirty seven minutes and 1 1/2 gal latter it was done. I checked the MPG it read 14.6 before it started and 14.00 when it quit. The truck never was moved. It has 4900 miles and this is the first time i was aware it regen. :doh: I discovered that the clutch, or brake will disengage the regen. Maybe thats why this is the first time I noticed. Thanks again EPA. A gallon and a half and the truck never moved. Good fuel milage!!!!!!!:( If your asking how I knew how much fuel was used, I have a Transfer Flow Trax II guage that reads the gallons in the tanks.
 
#21 · (Edited)
mine went into regen the first time with less then 200 miles on it, it lasted about 2 min. and has not come on since. hope the mileage gets better as time goe's on i'm only getting 11.4 around town and thats most of my driving to and from work. it may go to 11.7 going to work and back ( big $hit ) that will take it over the edge. delete pipe and kem may come sooner then I thought.


Darrell:icon_ford:
 
#23 · (Edited)
When my truck goes into regeneration it only lasts for a short while. Not sure what that would be exactly as it's hard to tell when it's doing it.

I see a sudden drop in mpg and maybe five miles or so later it starts coming back up. Mine does not consume near the fuel some people are indicating.

No smoke, noise, or sudden drastic loss of power that I can tell.

It seems to me that regeneration sitting at idle is not desirable as driving would be. However if driving makes it need more regeneration then I guess that's a problem. I think mine mostly stays clean by diving the way I do.


I'm guessing 400 or so miles between regeneration cycles but it would be a lot easier to tell if I had the regeneration indicator which I have never seen.

Seems that some peoples regeneration cycles are wasting a lot of fuel. Smoke coming out the exhaust does not sound to me like it's working correctly, isn't that what the DPF is supposed to be on there to stop?
 
#25 ·
My driving is mostly around town (short starts and stops), I usually don't go into regen more that every 500 miles or so. When it does go into regen it will stay for about ten minutes or so. Twice I have noticed a large white cloud of smoke behind me when it was really cold and I was in Regen. I am getting about 13 mpg in town but only have about 3500 miles on my truck so far.
 
#29 ·
It has to get better than that. It's not broke in yet.

Just stop screamin and drive it like you stole it. :)
 
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