DPF 90% full

[CUMMINZ]

For the first time in 20,000 miles my overhead just gave me 90% full indication. I continued driving hard for several miles and got it down to 70%. Can I expect it to continue to drop?

[HBarlow]

On another thread about the emissions systems a member referenced text on a Cummins website that explains the aftertreatment equipment. I don't know how to provide a link because it is in a text file but found it and read it.

I don't remember exactly how the writer explained it but his point was the trucks need to be driven hard in order to create sufficient heat in the exhaust system to bake the accumulated soot out of the dpf.

I'm afraid those of us who use these trucks as daily drivers and only work them hard on occasional towing trips may experience soot build up in the dpf.

If anyone wants to read the Cummins material it is on a site for "Cummins Filtration" but is not easy to find.

I realized that I tend to baby mine, rarely ever using full throttle acceleration.

[Freebore]

You're seeing exactly the kind of junk happen that just happened to mine as I was approaching 20k miles. I had been getting P2262 so took it to the dealer and they installed the AX flash (mines an 07). Went on vacation and 800 miles into the trip crusing 65, the warnings started. They were intermittent, they'd come and go, disappear, reappear, etc.

Two dealers later and they confirmed my truck's sofware was not updated properly and the overhead should have also had a TSB applied to it when it was flashed to the AX revision. Regardless, I had codes telling them the DPF was overtemperature (P200C) and the efficiency of it was flagged with 3 other codes. However, no parts were in the system so with a 20% plugged DPF at that time, I had to get home and didn't get any codes going back.

Right now I'm haggling with a local dealer who doesn't communicate with other dealers and believes flashing and regenerating is the cure for all these trucks problems. Just because the previous dealer cleared the codes during their diagnosis, this dealer won't do a thing (yet). I'm pulling receipts now to show proof of the problems.

If we really have the latest TSB done completely right, I understand there is a chance that we may be over the hump with some of these problems. They key is getting all the crap built up in the system out of it before any new components are installed downstream or you'll just have more problems. If they have to drill the turbo for flushing, one tech told me to make sure the exhaust is disconnected from the turbo during the process so it can blow out any metal particles and avoid damaging the emissions hardware in the exhaust.

[sag2]

Originally Posted by Freebore

You're seeing exactly the kind of junk happen that just happened to mine as I was approaching 20k miles. I had been getting P2262 so took it to the dealer and they installed the AX flash (mines an 07). Went on vacation and 800 miles into the trip crusing 65, the warnings started. They were intermittent, they'd come and go, disappear, reappear, etc.

Two dealers later and they confirmed my truck's sofware was not updated properly and the overhead should have also had a TSB applied to it when it was flashed to the AX revision. Regardless, I had codes telling them the DPF was overtemperature (P200C) and the efficiency of it was flagged with 3 other codes. However, no parts were in the system so with a 20% plugged DPF at that time, I had to get home and didn't get any codes going back.

Right now I'm haggling with a local dealer who doesn't communicate with other dealers and believes flashing and regenerating is the cure for all these trucks problems. Just because the previous dealer cleared the codes during their diagnosis, this dealer won't do a thing (yet). I'm pulling receipts now to show proof of the problems.

If we really have the latest TSB done completely right, I understand there is a chance that we may be over the hump with some of these problems. They key is getting all the crap built up in the system out of it before any new components are installed downstream or you'll just have more problems. If they have to drill the turbo for flushing, one tech told me to make sure the exhaust is disconnected from the turbo during the process so it can blow out any metal particles and avoid damaging the emissions hardware in the exhaust.

If the technician follows the procedure there is no chance to get chips in the system. Even if a few do, it is not going to have any negative effect. There have been many turbo cleans completed, and almost all are successful. The ones that do not for what ever reason will get a new turbo. It is very important that the technician follow ALL the TSB's that apply. It is somewhat confusing and I believe STAR is working on a one page guide that will assist the technician with applying the correct TSB(s) to get the truck repaired correctly. Where is your dealer that is holding off doing any repairs? Parts have been on and off back order to complete the necessary repairs and cleaning so getting them ordered is important.

[JLDanner]

SAG2 & others -

I've had my 6.7 since december - trouble free. Not so much as a cat near full message.

About 2 weeks ago for good measure I had the latest flash applied.

About 2 days ago I suddenly received a CAT 80% full message along with a "ding" sound - I looked around wondering what the heck that noise was all about - finally looked up and saw the problem. Odd that all of a sudden I get this message. So I'm locked up in Dallas traffic just hoping I can get to the local freeway fast enough As I'm heading out, the message goes away and the overhead said the usual "System OK" No ding sound. A second later the Catalyst 80% full message is back - no ding - then gone then back then gone then back....you get the picture (no dings). Finally I hit the highway and drive clear the hell around Dallas at 60 MPH watching my dashhawk (which tells me what regen mode its in) Manage to complete 2 full regen cycles. About 20 minutes in I hear the second ding and the Catalyst full message is permanently gone - a second earlier it was still 70%.

So a couple of questions to you all -

1.) It it normal to alternate randomly between Catalyst 80% and System OK
2.) Should the Catalyst status stayed there till it showed lower than 70%?
3.) Suppose there is a bug with my the latest flash? 2007 - 2500 6.7 68rfe

[Freebore]

sag2 - thanks for the clarification, I think I found a dealer who will follow the instructions.

JLDanner - you are describing exactly how my truck acted after getting the AX flash without the overhead being updated too. When I got to a dealer to check out the strange random particulate full messages, he said the overhead flash should take care of it but it should have been included when AX was done.

I have not had a code since, but there is a load of black soot in my tailpipe. I wipe it clean and it reappears, however the system seems to be doing the regens but I am concerned the DPF could have suffered, especially with P200C, P0242 and P1451 codes.

[JLDanner]

Just thought I would give an update for anyone interested in this thread -

Went to Dallas Dodge today and had the service manager verify that my truck had the latest engine/tranny flash (it already had latest version) and also had him check to make sure the body control computer (overhead readout) was updated - it was not - so he updated to the latest version and also turned on day time running lights for me (free of charge).

Long story short I'm hoping this is indeed why I and others have been getting the odd behavior of the overhead status (EVIC) readings. I guess the dealer did not realize (if this is the case) that whenever they do a flash for the engine, they should also do the body control computer.

Of course I just had this done - so I'm only guessing at this point that the problem is solved. I'll keep y'all posted.

On a side note - I asked him how many P2262 codes he had dealt with (he knew the code immediately). Claims there have been "some" and again told me to use the exhaust brake all the time (which I love to do anyway) and also said he is putting together a new service package that includes cleaning the turbo with the drill/tap/solution we all know about. Interesting to me - it sounds like a good plan, but it might also be a sneaky way for dodge to get the less informed to foot the bill for the soot accumulation problem (which luckily I have not had to date - knock on wood).



-J

[CUMMINZ]

For the most part I have gotten about 11mpg when towing. With 14k on truck and keeping up with flashes. I towed heavy for 6k last month with no problems other than problems with MP8. Averaged 9.5 on trip. I am home for less than 3 weeks and very little driving and all of a sudden get catalyst 80% full.

Going to dealer Thursday for him to force it to regen and drive out $100 bucks of fuel.

[JDupuis]

Originally Posted by JLDanner

Just thought I would give an update for anyone interested in this thread -

Went to Dallas Dodge today and had the service manager verify that my truck had the latest engine/tranny flash (it already had latest version) and also had him check to make sure the body control computer (overhead readout) was updated - it was not - so he updated to the latest version and also turned on day time running lights for me (free of charge).

Long story short I'm hoping this is indeed why I and others have been getting the odd behavior of the overhead status (EVIC) readings. I guess the dealer did not realize (if this is the case) that whenever they do a flash for the engine, they should also do the body control computer.

Of course I just had this done - so I'm only guessing at this point that the problem is solved. I'll keep y'all posted.

On a side note - I asked him how many P2262 codes he had dealt with (he knew the code immediately). Claims there have been "some" and again told me to use the exhaust brake all the time (which I love to do anyway) and also said he is putting together a new service package that includes cleaning the turbo with the drill/tap/solution we all know about. Interesting to me - it sounds like a good plan, but it might also be a sneaky way for dodge to get the less informed to foot the bill for the soot accumulation problem (which luckily I have not had to date - knock on wood).



-J

7.5 6.7 27,700 as of today. Had 3 instances of engine light which disappeared one day later each time. Unit not running well in the morning...like it is choking or something. Pulled to a stop, restart engine and things ok. Took to dealer today, unit needs new Turbo and new DPF, they had to order it and will take truck back there on Monday.

[JDupuis]

Dealer replaced Turbo... new flash, update to CCN, they also did a mobile DPF cleaning. Truck running like a charm at this time.

[salstrip]

if you ever get a cat full message,they can be removed and flushed out with water .
regards Conn

[Freebore]

Found a dealer that would work with me. Drilled & cleaned the turbo, replaced the DPF and Nox converter. Truck seems to run fine and no codes but have a rattle at startup that seems to sound like something bumping the frame or body. Taking it back to find the rattle.