Jump to content

Regen?

Njmurvin

By Njmurvin
in 6.6L Duramax Diesel (L5P)

 Share

Recommended Posts

Njmurvin Enthusiast

Njmurvin

Posted
Posted

I apologize if this is dumb question. I'm not new to diesels but I am new to the emissions related features (all my 04.5 Dodge Ram had was a catalytic converter). How do I know when a regen is happening? I have just over 1000 miles on the truck and I am assuming I've gone through at least one regen by now. Is there a simple way to know when it happens?

dab5577 Enthusiast

dab5577

Posted
Posted

Without adding a programmer or something the only way to tell on the L5P is getting out and noticing the smell of the exhaust at extreme temps or watching your fuel mileage take a big dip.


Sent from my iPhone using Tapatalk

unit Enthusiast

unit

Posted
Posted (edited)

Regens are pretty much imperceptible by the driver most of the time.  You may occasionally notice a drop in instantaneous fuel mileage or smell the odor hot pipes give off but that's about it.  I have a Banks iDash gauge that can show the soot level in the DPF and show when cleaning is taking place but I don't pay much attention to it most of the time.  You'll get a message on the dash if there is ever a problem.

Edited by unit
Added wording.
kylant Enthusiast

kylant

Posted
Posted

i think I had my first regen yesterday at about 480 miles. the truck way ideling a touch faster and there was a distinct smell coming from it. it smelt like burning bread, not the awful burning plastic type smell my other diesels make when they go through the process

  • 5 months later...
ahartzell2020 Enthusiast

ahartzell2020

Posted
Posted

I feel like my duramax has mini regens and full regens lol.

4-5 times since owning the truck I’ve noticed what’s described above: odd burning smell.

2 times I’ve noticed what I think is a true regen: drop in power, drop in MPG, and when I get on the accelerator during this, it sounds like an f16 is in my truck bed.


Sent from my iPhone using Tapatalk

redwngr Senior Enthusiast

redwngr

Posted
Posted
1 hour ago, ahartzell2020 said:

I feel like my duramax has mini regens and full regens lol.

4-5 times since owning the truck I’ve noticed what’s described above: odd burning smell.

2 times I’ve noticed what I think is a true regen: drop in power, drop in MPG, and when I get on the accelerator during this, it sounds like an f16 is in my truck bed.


Sent from my iPhone using Tapatalk

Shouldn't change power.

There is an extra fuel injector in the exhaust (after the turbo) that supplies the fuel for the heat for regen.

 

Yes it will drop the fuel economy during the approx 20 miles it takes for regen. 

Yes the exhaust will sound different.

 

Not sure how new your ride is, but the smell from grease/oil/coatings burning off exhaust components should disappear over time.

Colossus Senior Enthusiast

Colossus

Posted
Posted

actually I too feel like my Duramax has a bit more kick in the pants feel to it when it's doing a regen. 

ahartzell2020 Enthusiast

ahartzell2020

Posted
Posted
Shouldn't change power.
There is an extra fuel injector in the exhaust (after the turbo) that supplies the fuel for the heat for regen.
 
Yes it will drop the fuel economy during the approx 20 miles it takes for regen. 
Yes the exhaust will sound different.
 
Not sure how new your ride is, but the smell from grease/oil/coatings burning off exhaust components should disappear over time.

Had about 8mo and only about 6,000 miles on it.


Sent from my iPhone using Tapatalk
redwngr Senior Enthusiast

redwngr

Posted
Posted (edited)
10 hours ago, ahartzell2020 said:


Had about 8mo and only about 6,000 miles on it.


Sent from my iPhone using Tapatalk

It may have an exhaust leak if it still smells on occasion. 

Or leak in fuel supply to/at the 9th injector -- if any gets on outside of the exhaust it will smolder/smoke/smell.  Early LML's sometimes got a leak at the exhaust joint after the 9th injector and then smoke during regen. There were many many pages of posts/threads about this on the dmax forums. 

Edited by redwngr
ahartzell2020 Enthusiast

ahartzell2020

Posted
Posted
It may have an exhaust leak if it still smells on occasion. 
Or leak in fuel supply to/at the 9th injector -- if any gets on outside of the exhaust it will smolder/smoke/smell.  Early LML's sometimes got a leak at the exhaust joint after the 9th injector and then smoke during regen. There were many many pages of posts/threads about this on the dmax forums. 

How would I be able to tell short of taking to dealer?


Sent from my iPhone using Tapatalk

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing

  • Latest Articles

  • Posts

    • Z45
      Missing thrust bearing? And oil selection

      By Z45 · Posted

      Lake Speed is drumming up business for his company just by being in the spot-light so he has a vested interest in stoking the 0W-20 fire.  IMO  
    • Chuck FB
      summer road trips in the 2026 2500HD

      By Chuck FB · Posted

      I knew when I bought my truck that it had off road hill decent or craw control or whatever they call it and rolled my eyes at that but it gets throw on with other options my truck has, I just never had a heads up if the highway speed regular cruise setting had anything to do with the brakes and that took me by surprise. If you've ever been to the top of Pikes Peak and watched those ahead of you on the way down with their brake lights on constantly, one can guess they are probably not gearing down or not enough anyway if their vehicle will allow and a good reason their is a brake check spot part way down where they use an infra red heat gun to check how hot ones brakes are front and rear.    Your right that once one gets out of the front range by Denver and I've not been on that stretch of 285 between Denver and Fairplay myself but I know its high and Fairplay at 10000 feet, Buena Vista at 8000, it drops a bit from there but then your going back up and over the 11000 pass and Durango is at 6500 . So yes your definitely right that 6500 and a lot higher is the theme of going anywhere out in that direction from Denver but hey, the down hill sections give fantastic fuel mileage !.    I don't even look at the fuel pumps for what premium costs here, since I live on a farm and up to this point get fuel delivered I am rarely in front of a fuel pump and when I am, I am often using card lock bulk fuel stations so it tells me what the price is AFTER I buy the fuel. Looking up on gas buddy and converting to US gallons but in Canadian dollars, regular on average of the prices listed was around 5.95 and premium is around 7.00 . That was one reason I did not go for the 6.2 half ton aside from its lack of carrying/towing if one was going by the rule of using premium fuel and until recently one could only buy regular farm gas if playing the few cents off game for farm dyed fuel for a "farm licensed pickup". But yes I hear you on the fuel price difference and like the diesel theme with it often being more expensive then gas it doesn't have quite the charm to it either as it once did although right now here for some reason the price of diesel has come down more so its now inline with the price of regular gas. 
    • KARNUT
      Missing thrust bearing? And oil selection

      By KARNUT · Posted

      I agree with this assessment. As you know I’m testing longevity with vehicles for the first time. I have a few vehicles I passed to kids and grandkids. We’re all past 100K miles some approaching 170K. I’m the only one doing 5k oil changes. The rest whatever the minder says. I’m the only one doing frequent transmission service. My odyssey the trip vehicle at 200K will be finished as a trip vehicle. I recently changed to high mileage oil, Valvoline. I can’t get past the fact that all manufacturers want to claim long service life. I just don’t make sense that they would go with low weight oil for mileage. While sacrificing longevity.
    • Atlas
      Missing thrust bearing? And oil selection

      By Atlas · Posted

      There's absolutely a mountain of profit in catering to the "I do my own research" crowd, people who are certain they know better. And I don't mean there isn't data to support that 0w40 produces less wear product than 0w20 in an engine like the 3.0 Duramax, that only feeds them the assurance they need. Again, my whole thing with oil selection is, sure, 0w40 or 0w30 produces less wear product. Are we talking the difference between the engine lasting only 100k versus 200k? Or are we talking more like, if the engine will already go 350k on a good 0w20 regimen recommended by the OE, is using 0w40 going to get us to 355k, assuming we can even get the rest of the truck to last that long, meanwhile sacrificing the first 5y, 100k in powertrain warranty. The answer isn't easy, there are tradeoffs.   I willfully use 0w20 Dexos D for this reason, knowing that a 0w40 will produce slightly less wear. I don't believe the delta in wear product is meaningful over the lifetime of the engine, and I place much more importance on driving style and overall feeding and care of the engine as a whole. It's the mentality that someone can abstain from alcohol their whole life which is an amazing boost to health by itself, theoretically. But if they're sedentary, that lifestyle choice will most likely kill them young despite their other, concerted efforts. Maybe someone doesn't drink AND they are the perfect picture of health and activity AND they use 0w40 AND they treat their engine perfectly. If living until 130 years is the goal, sure, do that. But it's going to be a really old truck falling apart around a good engine for that last 30 years, without a doubt.   I watched Demonworks' other video on the 100k+ 3.0 Duramax that had dealer 0w20 changes on what appears to be OLM-prescribed intervals (8-10k).   The QR codes are still present and readable on the main bearings. That's how little wear it has.   That's not proof that anyone else should stick to 0w20, but it's confirmation, for me, that 0w20 is perfectly acceptable to use in these engines.
    • Z45
      Castrol Edge VS Amsoil OE

      By Z45 · Posted

      1Based on independent testing of OE 0W-20 in the Peugeot TU3M Wear Test as required by the dexos1 Gen 2 specification.

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...