Excessive regens leading to delete... what to expect??? - Diesel Place : Chevrolet and GMC Diesel Truck Forums
 
Home Forum Market Place Garage Tuning Library DTC Tool Register Vendors
Go Back   Diesel Place : Chevrolet and GMC Diesel Truck Forums > GM Diesel Engines > Duramax Fifth Generation: 2011-2016 (LML)
Register FAQ Forum Rules My Replies My Threads Mark Forums Read Advertise


Duramax Fifth Generation: 2011-2016 (LML) Discuss the fifth generation (2011-2016) of the 6.6L Duramax diesel engine & associated components. Engine related discussion ONLY.

DieselPlace.com is the premier Duramax Diesel Forum on the internet. Registered Users do not see the above ads.
Like Tree2Likes
  • 1 Post By Rvn4me
  • 1 Post By Rvn4me

Reply
 
LinkBack Thread Tools
Old 08-20-2019, 10:47 PM   #1 (permalink)
sfanello
Gear Grinder
 
sfanello's Avatar
 
Join Date: Nov 2017
Location: Madison, WI
Posts: 3
iTrader Score: 0 reviews

Excessive regens leading to delete... what to expect???

So here's where I'm at... my '11 LML (93k mile) gets horrible mileage (11-12 ave) and regens <200 miles. From my research, I'm finding it could be a bad 9th injector, the DPF is going bad, the pressure sensor is bad, or the injectors are "leaking" causing more soot. Regardless, no codes are thrown and no other issues are apparent. Lots of reason are leading me to head down the path of driving down that extremely bumpy road until all that emissions stuff falls off...

That being said, what are all your experiences after deleting that had similar situations? One of my main concerns is if it is an injector issue causing the excessive regens, and they are dumping more fuel than needed, than regardless of what "clean" tune I get, I could end up blowing a lot of black smoke, which is not what I'm after... I want engine reliability and longevity, plain and simple!

(See sig for current upgrades... next upgrade would be WcFab Y-bridge Kit if the EGR happens to fall off that bumpy back road)

Thanks for your input!

__________________
2011 Chevy 2500HD LT 4x4 LML
S&B Cold Air Intake
Sinister Intake Bridge w/ Resonator Delete
WcFab Hot Side IC Pipe
Fleece PCV Block Off w/ Reroute
FASS 165 Lift Pump
Beans Sump
Edge CTS Insight
3" Leveling Kit
285/75R17 Nitto Grappler G2's
Offline  
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 08-21-2019, 11:30 AM   #2 (permalink)
Rvn4me
Diesel Pro
 
Rvn4me's Avatar
 
Join Date: Jun 2016
Posts: 2,234
iTrader Score: 0 reviews

Michigan Oil Burners Member

Regen is based on soot load. Soot load is determined by pressure drop across the dpf.
Google (Duramax LML Excessive regens no codes) lots of pointers.


Last edited by Rvn4me; 08-21-2019 at 11:36 AM.
Offline   Reply With Quote Quick reply to this message
Old 08-21-2019, 06:28 PM   #3 (permalink)
sfcjones
Diesel Legend
 
sfcjones's Avatar
 
Join Date: Mar 2007
Location: Back in South GA...
Posts: 16,140
iTrader Score: 1 reviews

Georgia Diesel Owners Club Member

Armed Forces Club Member

I would just find a way to turn off the egr verses a complete delete. Replacing the Y Bride is a PIA
__________________
Tim
2009 Chevy CC 2500HD LTZ LMM Z71 283k miles
2004 GMC SLT LB7 CC 455k Miles (Retired)(Sold)
2007 Chevy Tahoe with Ranch Hand 240k Miles
2010 Chevy Suburban LTZ 75th Diamond Edition, 106k Miles
Member #67 A(ACLU) Agent Sgt. Slaughter
DP Jug Holder #3
US Army Veteran 25 Years of Service
You havenít lived Ďtil youíve almost died. For those who have fought for it, life has a flavor the protected will never know.(MACV-SOG)
'A man will reveal his character through his actions, not his skin color.'
Romans 10:13 For Whosoever shall call upon the name of the Lord shall be Saved.
NRA Patriot Life Benefactor Member
Online   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 08-21-2019, 08:37 PM   #4 (permalink)
redwngr
Diesel Expert
 
Join Date: Jan 2008
Location: SW ONT
Posts: 2,726
iTrader Score: 0 reviews

Quote:
Originally Posted by Rvn4me View Post
Regen is based on soot load. Soot load is determined by pressure drop across the dpf.
Google (Duramax LML Excessive regens no codes) lots of pointers.
Can also start based on miles, engine hours or fuel burned since last regen.
__________________
2018 L5P Sierra 4x4 SB Denali
Sold 2011 LML Sierra 4x4 CCSB SLT
Sold 2010 LMM Sierra 4x4 CCSB SLT
Sold 2004.5 LLY Sierra 4x4 ECLB SLE
Offline   Reply With Quote Quick reply to this message
Old 08-22-2019, 08:38 AM   #5 (permalink)
Rvn4me
Diesel Pro
 
Rvn4me's Avatar
 
Join Date: Jun 2016
Posts: 2,234
iTrader Score: 0 reviews

Michigan Oil Burners Member

Quote:
Originally Posted by redwngr View Post
Can also start based on miles, engine hours or fuel burned since last regen.
Thanks, learned something new. Miles I New 700, but engine hours or fuel burned since last regen I didn’t.

So how many hours or fuel burned since last regen is needed to activate regen process?
I see people’s observations on fuel used between regen varies. Never seen hours.

Differential pressures before and after the DPF help the ECM determine when enough soot has built up to trigger an Active Regen.
On an LML the active regen process initiates once 42 grams of soot have collected in the DPF or after 700 miles without active regen (whichever comes first).

Last edited by Rvn4me; 08-22-2019 at 08:49 AM.
Offline   Reply With Quote Quick reply to this message
Old 08-23-2019, 01:04 AM   #6 (permalink)
sfanello
Gear Grinder
 
sfanello's Avatar
 
Join Date: Nov 2017
Location: Madison, WI
Posts: 3
iTrader Score: 0 reviews

I have the Edge CTS2 and have been monitoring the soot load and distance between regens. It will regen anywhere between 150-200 miles when it reaches 42grams... will go down to 2-6grams before tuning off and the count starts over. I do not let the truck sit and idle so it's not that. I am running a fuel additive and have heard that could cause some issues with regening more, but this seems excessive to me regardless.
__________________
2011 Chevy 2500HD LT 4x4 LML
S&B Cold Air Intake
Sinister Intake Bridge w/ Resonator Delete
WcFab Hot Side IC Pipe
Fleece PCV Block Off w/ Reroute
FASS 165 Lift Pump
Beans Sump
Edge CTS Insight
3" Leveling Kit
285/75R17 Nitto Grappler G2's
Offline   Reply With Quote Quick reply to this message
Old 08-23-2019, 01:53 AM   #7 (permalink)
redwngr
Diesel Expert
 
Join Date: Jan 2008
Location: SW ONT
Posts: 2,726
iTrader Score: 0 reviews

Quote:
Originally Posted by Rvn4me View Post
Thanks, learned something new. Miles I New 700, but engine hours or fuel burned since last regen I didnít.

So how many hours or fuel burned since last regen is needed to activate regen process?
I see peopleís observations on fuel used between regen varies. Never seen hours.

Differential pressures before and after the DPF help the ECM determine when enough soot has built up to trigger an Active Regen.
On an LML the active regen process initiates once 42 grams of soot have collected in the DPF or after 700 miles without active regen (whichever comes first).
Somewhere there was a a description of the others that I think included values -- I don't recall where, but perhaps it was been a service or training document somebody posted. I was a little surprised to see it in black and white.
__________________
2018 L5P Sierra 4x4 SB Denali
Sold 2011 LML Sierra 4x4 CCSB SLT
Sold 2010 LMM Sierra 4x4 CCSB SLT
Sold 2004.5 LLY Sierra 4x4 ECLB SLE
Offline   Reply With Quote Quick reply to this message
Old 08-23-2019, 08:46 AM   #8 (permalink)
Rvn4me
Diesel Pro
 
Rvn4me's Avatar
 
Join Date: Jun 2016
Posts: 2,234
iTrader Score: 0 reviews

Michigan Oil Burners Member

Quote:
Originally Posted by redwngr View Post
Somewhere there was a a description of the others that I think included values -- I don't recall where, but perhaps it was been a service or training document somebody posted. I was a little surprised to see it in black and white.
I would really like to see where engine hours or fuel burned since last regen will trigger an Active Regen.

Last edited by Rvn4me; 08-23-2019 at 08:48 AM.
Offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Diesel Place : Chevrolet and GMC Diesel Truck Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

PLEASE READ! You must check your email inbox for the confirmation link to complete registration. Please check your spam box if you do not see the email in your inbox.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Insurance
Please select your insurance company (Optional)

Log-in


Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -4. The time now is 10:57 PM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Shoutbox provided by vBShout v6.2.1 (Lite) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd. Runs best on HiVelocity Hosting.
© AutoGuide