02-26-2011, 09:55 AM
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?
02-26-2011, 12:07 PM
Driving habits like that are the worst thing short of extended idling that you can do to the 6.7. Take it to the dealer and let them have a look at it because that shouldn't happen with that few miles on it.
03-01-2011, 01:03 AM
I drove a new Ram off the lot for a parade this past summer. It only had 10 miles on it when we picked it up. After driving roughly 30 miles in the parade (it was a multi-town torch run type of parade) at only 5-10mph the exhaust filter became clogged. It turned out one of the people in the parade owned a similar truck and he said the only way to clean the filter was to "blow it out" by going fast since it was clogged by going slow. The truck was the main attraction of the parade (it had sponsers on it and the water for the people running behind it) and there happened to be a highway entrance nearby so they (and by they I mean the state troopers escorting the truck for the parade) let me take it as fast as I could to blow it out. Well it worked. After about 2 minutes of going 85mph the display actually said it went from 90% full, to 85%, and so on until it wasn't clogged anymore.
03-01-2011, 12:01 PM
Dont panic to much. Yet. When your trucks filter is 100% full and goes into limp mode is when you panic.
Two types of regeneration the truck "should" go through theres passive regeneration which is what has been mentioned, beat the hell out of the truck and it'll burn the particulate out of the filter (but particulate burns at 600 degrees celsius) or if the filter is full the truck should go into active regeneration which runs raw fuel through the filter as a catalyst (brings burning tempurature down to 350-450 degree C). It can use several gallons of fuel from what I understand.
One of the best things you can do to a turbo diesel is lower the EGTs and eliminate any backpressure after the turbo. DPF is doing the exact opposite. (600 C =1112 F for comparison)
03-01-2011, 02:34 PM
Unplug the EGR!!
You have to do more then just unplug the EGR
You need a tuner or itll throw codes. Get EGR block-off plates to do it the right way!
Unplugging the EGR wont really help the dpf filter. Recirculating the exhaust gas does increase particulate but not all that significantly. You should do a dpf delete before messing with the EGR or you'll start clogging you NOx filter.
Unplugging the EGR will stop the exhaust gas recirculation into the intake and the truck will run stronger and cleaner (you'll notice a big difference when you change your oil)