The Diesel Truck Site  

Go Back   The Diesel Truck Site > Diesel Truck Forums > Chevrolet & GMC Duramax Forum

Chevrolet & GMC Duramax Forum Chevrolet & GMC Duramax Forum


Reply
 
Thread Tools Display Modes
  #1  
Old 04-18-2013, 02:01 PM
stodg73's Avatar
stodg73 stodg73 is offline
Out There, Savin' Lives
 
Join Date: Nov 2010
Location: Southern Colorado
Posts: 2,322
Default Forcing a regen while engine derated

Yesterday, the check engine light came on the ambulance(2011 GMC with the Duramax) that I was driving. It also went into limp mode. I shut it off for a bit (30 + minutes). Went to restart it and it said 'engine derated clean exhaust filter, see owners manual'. Well, I had a call to go to and it did not want to go very fast. It had also snowed about 10" that day. I manually forced it to regen by putting the transmission in manual mode and keeping the RPM's between 2500 & 3500, about 35 to 40 MPH. I drove it for about 30 minutes, approx. 15 miles, after doing the high RPM's, the clean exhaust filter went out and the truck operated normally. However, the check engine light was still on.
__________________
O.O., 01.5, Dodge, 2500, High Output (H.O.) Cummins Turbo Diesel (245/505), Quad Cab Long Bed (QCLB), 4x4, Sport, Original Bosch VP 44 Injection Pump, 6 Speed/NV5600 Transmission, 3.55 Gears, 105k, currently stock engine, Fram Air Filter, 285/75R16s, Glow Shift Gauges: Fuel Pressure (FP), Boost, Exhaust Gas Temperature (EGT), Oil Temperature, SMARTY@1, Airtex lift pump 19 psi @ idle, 14 psi @ WOT, Propane Injection, 2 Stroke Oil, Intake Air Temperature (IAT) Fooler = Better MPG, Bed Lined, Chrome Nerf Bars, more to come!!

Toys:
'79 CJ5, 258ci, 3" lift, 33x12.50x15, Stock Engine and 3 Speed Tranny
'05 Suzuki, GSX1300R, Hayabusa, All Stock, #3('00 blown engine, '00 stolen, & '05)
The complete live & learn and pass it on by H. Jackson Brown, Jr.
Reply With Quote
  #2  
Old 04-21-2013, 04:16 PM
MnTom's Avatar
MnTom MnTom is offline
Administrator
 
Join Date: Nov 2010
Location: Near Duluth, Mn
Posts: 4,914
Default

So, what was the cause of the check engine light and why didn't it regen on its own?
__________________
1996 RAM "Custom Ground" 100 plate 3/4 forward, 300 injectors, 16.5 timing, Goerends Auto = 365HP, 833TQ Third Gen Rims, Aluminum Headache Rack
Duct Tape can't fix stupid, BUT it can muffle the sound
Reply With Quote
  #3  
Old 04-21-2013, 04:21 PM
stodg73's Avatar
stodg73 stodg73 is offline
Out There, Savin' Lives
 
Join Date: Nov 2010
Location: Southern Colorado
Posts: 2,322
Default

Quote:
Originally Posted by MnTom View Post
So, what was the cause of the check engine light and why didn't it regen on its own?
The cause was I was not able to keep the speed up above 55 MPH due to weather, 12 + inches of snow on the highway. I drove some 45 miles at 40 MPH or slower and the exhaust filter got plugged and the engine computer derated itself.

I wonder if this will work on other diesels?
__________________
O.O., 01.5, Dodge, 2500, High Output (H.O.) Cummins Turbo Diesel (245/505), Quad Cab Long Bed (QCLB), 4x4, Sport, Original Bosch VP 44 Injection Pump, 6 Speed/NV5600 Transmission, 3.55 Gears, 105k, currently stock engine, Fram Air Filter, 285/75R16s, Glow Shift Gauges: Fuel Pressure (FP), Boost, Exhaust Gas Temperature (EGT), Oil Temperature, SMARTY@1, Airtex lift pump 19 psi @ idle, 14 psi @ WOT, Propane Injection, 2 Stroke Oil, Intake Air Temperature (IAT) Fooler = Better MPG, Bed Lined, Chrome Nerf Bars, more to come!!

Toys:
'79 CJ5, 258ci, 3" lift, 33x12.50x15, Stock Engine and 3 Speed Tranny
'05 Suzuki, GSX1300R, Hayabusa, All Stock, #3('00 blown engine, '00 stolen, & '05)
The complete live & learn and pass it on by H. Jackson Brown, Jr.

Last edited by stodg73; 04-21-2013 at 04:29 PM.
Reply With Quote
  #4  
Old 04-25-2013, 11:32 PM
Mopar1973Man's Avatar
Mopar1973Man Mopar1973Man is offline
Senior Member
 
Join Date: Nov 2010
Location: New Meadows, Idaho
Posts: 902
Default

Interesting...

It would help if you had a pyrometer installed and you would know if your getting enough EGT's to clean. But as for the CEL I would dump the codes and look them up. Then clear the codes and see if they return if so then you have a real issue if not then you have a issue that was resolved.
__________________
Michael Nelson - AKA: Mopar1973Man - Forum & Articles
2002 Dodge Ram 2500, 5.9L Cummins Turbo Diesel, 5 Speed NV4500 transmission, 4x4, 3.55 Gears, AirDog 150 fuel pump with 1/2" Big Line Kit, Stock Bosch VP44 Injection Pump, Bosch RV275 Injectors +40HP, Edge Comp Performance Box, BHAF (Big Honkin' Air Filter), Stock Holset HX35W Turbo, Straight 3" Pipe Exhaust, Crankcase Vent Mod, High Idle Mod, MPG / IAT fooler Mod, ScanGauge II, 25% Tinted Windows, DiPricol Gauges (Fuel pressure, Boost, Pyrometer), 235/85 R16 tires mounted on 16x7 Aluminum mags (weighing 62#), Custom Fog Lights, Custom Backup lights, Silverstar Headlights, 23-24 MPG

1996 Dodge Ram 1500, 5.9L Magnum V8 Gasoline Engine, 46RE Automatic Transmission, 4WD with CAD axle with 3.55 Gears, Mopar Performance PCM, Gutted Kitty, ScanGauge II, 35% Tinted Windows, 16-17 MPG

Reply With Quote
  #5  
Old 02-02-2014, 09:20 AM
Raw Dodge Raw Dodge is offline
Junior Member
 
Join Date: Jan 2014
Posts: 4
Default

We had a 2010 4500 duramax ambulance in the shop, DIC says replace exhaust filter.. Only 40k miles but lots of idling. 2005 engine hours.. Its still under warranty so we sent it to the dealer..
__________________
2004 Duramax k2500HD 4x4,CCSWB.
Reply With Quote
  #6  
Old 02-04-2014, 03:09 PM
MnTom's Avatar
MnTom MnTom is offline
Administrator
 
Join Date: Nov 2010
Location: Near Duluth, Mn
Posts: 4,914
Default

Quote:
Originally Posted by Raw Dodge View Post
We had a 2010 4500 duramax ambulance in the shop, DIC says replace exhaust filter.. Only 40k miles but lots of idling. 2005 engine hours.. Its still under warranty so we sent it to the dealer..
So, do you know the outcome? Sounds like a real need for a high idle on it!
__________________
1996 RAM "Custom Ground" 100 plate 3/4 forward, 300 injectors, 16.5 timing, Goerends Auto = 365HP, 833TQ Third Gen Rims, Aluminum Headache Rack
Duct Tape can't fix stupid, BUT it can muffle the sound
Reply With Quote
  #7  
Old 02-04-2014, 03:11 PM
MnTom's Avatar
MnTom MnTom is offline
Administrator
 
Join Date: Nov 2010
Location: Near Duluth, Mn
Posts: 4,914
Default

Quote:
Originally Posted by stodg73 View Post
The cause was I was not able to keep the speed up above 55 MPH due to weather, 12 + inches of snow on the highway. I drove some 45 miles at 40 MPH or slower and the exhaust filter got plugged and the engine computer derated itself.
I wonder what would have happened if you would have manually downshifted it to get the RPMs up?
__________________
1996 RAM "Custom Ground" 100 plate 3/4 forward, 300 injectors, 16.5 timing, Goerends Auto = 365HP, 833TQ Third Gen Rims, Aluminum Headache Rack
Duct Tape can't fix stupid, BUT it can muffle the sound
Reply With Quote
  #8  
Old 02-04-2014, 03:59 PM
Raw Dodge Raw Dodge is offline
Junior Member
 
Join Date: Jan 2014
Posts: 4
Default

N, its still out of service, it came in for pm, the water pump let go while we were pulling it in the bay..kinda surprised me within only 40k..my 04 has 142k knock on wood still not leaking.I have no idea how many hours labor it would be to do that job on a van but it did not look easy. Open hood and all you see is intercooler and various plumbing....When I get the results of repairs I will share them.
__________________
2004 Duramax k2500HD 4x4,CCSWB.
Reply With Quote
  #9  
Old 02-04-2014, 04:02 PM
MnTom's Avatar
MnTom MnTom is offline
Administrator
 
Join Date: Nov 2010
Location: Near Duluth, Mn
Posts: 4,914
Default

OK, Thanks! I look under the hood of any newer diesel and all I see is a bunch of plumbing and other crap in the way. Guess I am too used to my older truck!
__________________
1996 RAM "Custom Ground" 100 plate 3/4 forward, 300 injectors, 16.5 timing, Goerends Auto = 365HP, 833TQ Third Gen Rims, Aluminum Headache Rack
Duct Tape can't fix stupid, BUT it can muffle the sound
Reply With Quote
Reply

Bookmarks

Tags
cold regen, def, diesel exhaust fluid, duramax regen, engine derated, exhaust filter, forcing regen, limp mode, manual regen, manual regeneration, owners manual, regen, regeneration

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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

Forum Jump


All times are GMT -5. The time now is 09:33 AM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Skin & Style Created By: Mopar1973Man.Com
Copyright 2012 Diesel Truck Site