DPF.... CAN I TAKE IT OFF

[speedsport]

2007 2500 SERIES 6.7 DIESEL. bEEN TO DEALER 4 OR 5 TIMES FOR POOR ENGINE PERFORMANCE AND REGENERATION ENABLING WAY TOO OFTEN. IS THERE A PREDATOR FIX FOR THIS PROBLEM????? THANKS, MARK

[concoursd]

you need a dpf delete and edge racing module. If you are located in a state that does smog inspections regularly then you will fail and your warranty will most likely be void because you need the edge racing module installed at all times in order to operate the truck with the dpf delete. You may also want to look into an EGR delete as they tend to clog up on diesels.

[ksmopars]

Either the dealer is not cleaning the dpf properly, or u r not driving it like work truck. the 6.7 diesel is a bad ass engine. ALWAYS use the exhaust brake, even for going to the corner store. DO NOT LET IT IDLE for more than 10-15 mins. Diesels run cold and allowing them to idle, allows carbon build up. Drive the truck hard...always. I am a certified level 4 gas and diesel tech at my local dodge dealer and when i clean the turbos or the dpf.......THEY DO NOT RETURN for the same complaints.

[johnnymanson]

the 6.7 is a good engine but the bullshit mickey mouse emissions systems they installed on them suck. the new flashes seem to just mask the problems but there still there. i have seen a truck with deleted dpf and egr and he has no problems.

[ksmopars]

the "mickey mouse emissions" u r talking about is due to the feds wanting "cleaner" emmisions from a diesel and the fact that owners r not being " properly instruced" on how "to drive" a diesel. the cummins LOVES to be run hard. always use the exhaust brake. if u want to run the dpf delete, then that is ur choice. but remeber, if u need warnty work done, THEN U NEED TO PUT THE TRUCK BACK TO STOCK, or the dealer can refuse to work on it.

[johnnymanson]

the dpf is a filter and filters need to be changed. a $2000 filter at the owners expense plus turbo, egr and cooler cleaning. labor and parts will be over $5000 ever 100,000 miles. the systems where rushed and poorly designed.

[concoursd]

okay johnny, the dpf is not a replaceable filter like your air cleaner. It is a filter that is designed to be cleaned during the driving cycle of the truck automatically. You need to educate yourself about your vehicle. There are sensors installed around the DPF (pyrometers) and they help calculate when the Diesel Particulate Filter is full. When it is estimated to be full, the truck goes into regeneration mode aka regen. The dodges require regen to occur during a 15-30min drive cycle. Short trips during regen do not count and cause terrible city fuel mileage. The regen cycle consists of the computer over-fueling the engine to heat up the soot in the dpf and burning it off. This is sort of like how a self cleaning oven in your kitchen does its thing.

The EGR valves do get coked up but like ksmopars mentioned, driving it hard will burn off a lot of that soot in the EGR valve. The problem for dodge is that the design of these emissions parts do not work well in ALL driving conditions and driving styles. A $50,000 truck should have been better designed before production. Dodge knew about the emissions changes 7 years ago so they had plenty of time to figure it out and actually road test it.

If you dont like dealing with this equipment and dont mind the possible issue with your warranty, then get an Edge Racing Module and offroad exhaust that deletes the DPF and catalytic converters and an EGR delete kit that will block off the EGR cooler and EGR valve.

[concoursd]

More information for you johnny,

This is an excerpt from the Edge Module User Manual and it explains in basic terms the function of your DPF and catalytic converter systems:

Your vehicle is equipped with a diesel particulate filter (DPF). This filter is used in
conjunction with a diesel oxidation catalyst. Together they work to reduce the amount of
harmful exhaust emitted from the tailpipe. As soot builds up in the DPF it will begin to
restrict the filter. The soot that gathers is automatically purged in one of two ways:
Passive Regeneration & Active Regeneration. Both methods occur automatically and
require no action on your part. During either of these regeneration methods, you may
notice an increase or change in the exhaust noise & increased EGT.

Passive Regeneration
Passive Regeneration happens when the exhaust temperature (EGT) reaches an
appropriate level in order to oxidize or burn soot to clean the DPF. This method happens
as a result of normal engine operating conditions, typically when the engine reaches an
EGT high enough to burn off the soot (i.e. heavy towing, high load conditions etc.)

Active Regeneration
If EGT’s do not get hot enough to cause Passive Regeneration, then your truck’s enginecontrol
system automatically initiates an active regeneration. During active regeneration,
the DPF is cleaned by raising the exhaust temperature to a point where the soot is burned
away. This is accomplished through various engine actions which raise the EGT’s in the
oxidation catalyst/DPF system to an appropriate high level where the soot is burned off.
After the soot is burned off, the EGT’s and back-pressure (restriction) fall back to normal
levels.

Note: Along with a diesel particulate trap your vehicle is equipped with a NOx (Oxides
of Nitrogen) trap. This trap is designed to minimize the amount of NOx that your vehicle
emits by absorbing the NOx into the trap. Once the trap is full the vehicle will
automatically regenerate the trap by shutting off the intake and opening the EGR
(exhaust gas recirculation) valve. This process will cycle on and off, thus causing an
increase in EGT (exhaust gas temperature). The increased EGT allows the trapped NOx
to be removed. While this process is happening you will notice a fluctuation in EGT,
even while maintaining a constant load. This process will occur as often as needed and
is necessary for the proper operation of your vehicle’s emission reduction system.

[johnnymanson]

i'm not here to go back and forth on how knows more i'm just trying to help with my knowings of the systems. i do not piss in the cash draw. indeed the dpf is a changable filter. the regen is design to burn off the soot traped in the front section of the dpf. when soot burns it turns into ash and is traped in the rear setion of the dpf. it can only hold so much ash and then it needs to be changed. how much soot is generated by the engine is driving habbits and the type of fuel and oil used. if you do not use ultra low sulfer fuel and oil that is dpf compliant. you will generate more soot inturn filling the dpf with ash faster.