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  #11  
Old 02-26-2011, 12:31 PM
Stangshcky12 Stangshcky12 is offline
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The truck "should" regenerate on its on, if the trucks running hot enough (ie beat the hell out of it) it'll clear out the filter (passively) and if not the truck will use raw fuel to burn out the particulate(from what I've heard/noticed is that it can use several gallons of fuel) this is your active regeneration.
I say "should" because every once in a while they decide not to go into regeneration which puts the truck into limp mode so you can try lug it back to the dealer. Enough times make a dpf delete sound like a great idea
As the filter gets fuller it increases the back pressure in your exhaust. The backpressure shouldnt hurt anything much mechanicly just performance wise, when you think about how a turbo works you can only push as much air through it as you can push out of it.
In an effort to make these trucks run better everyone tries to lower there exhaust gas temperatures. Diesel particulate burns around 600 C (1112 F) by itself and somewhere around 350-450 C with fuel as a catalyst.

Last edited by Stangshcky12; 02-26-2011 at 12:35 PM.
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  #12  
Old 03-10-2011, 02:03 PM
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rsg1963 rsg1963 is offline
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Quote:
Originally Posted by pnsballard View Post
How do you "regenerate" the filter? I just picked up a 2011 2500 Laramie with the 6.7 last week and I already have the "Filter is 80% full" message at only 400 miles on the truck! I live on an Air Force Base and I have primarily been driving it on base at low speeds/stop-go traffic this week. Do I need to get her on the highway and open her up? My dealer also had to drive it up from another dealer that is 300 miles away. Could they have done something to it?
Highway speeds (70mph) and towing are the best solutions. If you could hook up a heavy trailer for just 30 minutes or so every week or two, you'd probably be okay. They need to be worked to stay clean and not trigger a regen.
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  #13  
Old 03-20-2011, 02:47 AM
Phillies3500 Phillies3500 is offline
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ok for quick clarification. does the 5.9 have a dpf and if so do they sell a delete kit for it. this when this is removed you gain power and increase gas mileage. tuner is needed to turn check engine light off. correct me if i am wrong.
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  #14  
Old 03-20-2011, 02:58 AM
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Quote:
Originally Posted by Phillies3500 View Post
ok for quick clarification. does the 5.9 have a dpf and if so do they sell a delete kit for it. this when this is removed you gain power and increase gas mileage. tuner is needed to turn check engine light off. correct me if i am wrong.
Only the 6.7's have a dpf. All I have (5.9) is a Cat and it makes about zero difference in power if removed. I had my muffler guy remove it and I ran it for about a week. (No check engine light comes on) I noticed ever-so-slightly lower exhaust temps, but no noticeable diff in power or fuel economy. Apparently, the same can not be said for the dpf on the 6.7's.
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  #15  
Old 03-20-2011, 02:32 PM
Phillies3500 Phillies3500 is offline
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thank you for clarification. pa laws are real strict about emissions so that isnt really an option here.
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  #16  
Old 03-20-2011, 03:59 PM
Stangshcky12 Stangshcky12 is offline
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Quote:
Originally Posted by Phillies3500 View Post
thank you for clarification. pa laws are real strict about emissions so that isnt really an option here.
There not all that bad in PA actually. I live in allegheny county which used to be the only county in PA that requires emission inspection. Diesel trucks are emmisions exempt (up untill 07 I think) How do you think all these guys with stacks get away with it haha
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  #17  
Old 04-01-2011, 09:51 AM
metterfalcon metterfalcon is offline
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i'm getting 17mpg on my 05 5.9L diesel now. I assume if i removed the DPF on my truck I would need to use a programer? From the above posts it was referring to a 6.7L?
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  #18  
Old 04-01-2011, 02:18 PM
Stangshcky12 Stangshcky12 is offline
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Only 6.7l have dpf systems on them
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  #19  
Old 04-01-2011, 09:34 PM
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Quote:
Originally Posted by metterfalcon View Post
i'm getting 17mpg on my 05 5.9L diesel now. I assume if i removed the DPF on my truck I would need to use a programer? From the above posts it was referring to a 6.7L?

You don't have a DPF. Only a cat and muffler (if it's stock).
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