Chevy/GMC Truck and Duramax Turbo Diesel Forum Discussion of General Topics related to All Chevy and GMC Trucks as well as the Diesels in them

Duramax Exhaust Question

  #21  
Old 05-14-2008, 10:37 AM
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Well, it goes further than that. How deep you want to go?

Simple answer is eliminating the DPF, and using a programmer....bla bla bla.

Longer answer, if you drive the truck as it was designed (towing) odds are the system may never need regen or only for a short time. The only time the DPF gets 'clogged' is when useing the truck like a car or sitting at idle for a long time.

Brings me to another thing; If you still refuse to drive your truck as it was designed and the DPF gets to 150% restricted, it sends you into limp mode. Only way out is towing it into the dealer and having a tech use the Tech2 and force a regen.....which is most impressive. This is what we did in class, the truck slowly climes the rpm up to 2200 and egt at 1100* until the DPF reads 0% restriction which could take up to 45 minutes. Get the hotdogs and marshmellows out
 
  #22  
Old 05-14-2008, 10:42 AM
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jeez 45 minutes how much fuel did it burn up doing that
 
  #23  
Old 05-14-2008, 11:42 AM
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We only let it run for about 10-15 min just to see how it worked, then aborted the test, but it's safe to say to will burn a LOT of fuel. It won't even let you do it if the tank is low.
 
  #24  
Old 05-14-2008, 12:03 PM
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i bet that does use a bunch of fuel that is what is keeping me from even looking at a new truck
 
  #25  
Old 05-14-2008, 04:34 PM
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ya i think my quad is supose to set or make regen but i never got it to ive had the limp mode before thats wy its now in the barn, dpf that is
 
  #26  
Old 05-14-2008, 04:53 PM
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GM wanted 1800 for a new exhaust from muff back; They are on Crack. I imagine my bro uses his regen because he doesn't tow with it, buit does a lot of highway miles.
 
  #27  
Old 05-14-2008, 08:30 PM
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Highway driving still won't give you enough constant high EGTs to 'burn' the soot.
 
  #28  
Old 05-14-2008, 09:47 PM
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I'll tell him.
Thanks everyone!
 
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