Black smoke with DPF????
 

Ive got an 08' 2500 QuadCab auto thats been acting strange the last several weeks.

One day I stopped into a shop of one of our vendors and left the truck idling (5 minutes tops) and when I came back out the engine was high idling (1100 rpm or so)

Touched the brake to shift and it idled down to normal. Pulled out on the road and this thing had about as much power as the 71 Dodge diesel my dads father-in-law owns.

Press on the accelerator and it would bog down and I noticed white smoke blowing out the rear. Pulled to a stoplight and it would idle up to about 1100 rpm or so and on down to maybe 100 rpm. I pulled through the intersection and it seemed to run regularly for about 10 seconds.

Then the IC popped up with a DPF 70% Full message. 20 seconds later and it gave me a DPF 90% Full message, followed immediately by a DPF 100% Full. Regeration in Progress message.

I was on a 4 lane road in the edge of town so I left it in 3rd gear and kept the rpm's around 2300. Within a half a mile, it told me that regeneration was complete except that it was blowing black smoke out the tailpipe like it was going out of style.

I had to drive it for two days before I could get it into the dealer and noticed that it was regularly blowing out a light black smoke. It would smoke when it was idling at a stoplight but just enough to notice and would puff out a little when accelerating and when the tranny would upshift. Other than that, the exhaust would be clear until I would get up to cruising speed in 6th gear and then I noticed it would lightly smoke continiously unless I would press the accelerator, or slow down. I took it into a nearby dealer and the informed me that it needed a crank case filter (which of course wasnt covered by warranty) and had a few other codes that needed to be flashed.

I picked up the truck the next day and they had changed all the O2 sensors and put the heat wrap on the exhaust pipe and told me it was good to go, and there were no further issues. As a matter of fact, the truck ran better than it had ever before. However, it was still doing the whole smoking act like before.

Ive called the dealer and talked to their service manager and have been told time and time after again, that its perfectly normal. That its nothing more than "de-sooting".

If its perfectly normal, why has it never happened before? I had never seen smoke come out of the tailpipe the entire year that Ive owned it?

With the exception of an AE BruteForce CAI, its completely stock. Any ideas?

have u noticed any difference in fuel milage? what about your oil, it aint making any is it. maybe some one else who has had this problem will chime in here in a lil while :U:

You shouldn't have smoke of any color coming out the exhaust with a dpf in working condition. I'm just guessing here, but I would guess that your dpf is no good.

smoking is not right with dpf.

The DPF is likely disconnected (by the dealer). Some dealers have actually been known to do these sorts of modifications as this design is only part of the real solution and only really works on the bench.

Your truck shouldn't be idling high either unless it is cold out but as I don't know where you are I can't say if that is real or not.

What do you think would happen if you did the key on / key off 3x and checked for codes? What about scanning it with your own tool or a private auto parts scanner? IE: getting a second opinion?

Sounds fishy to me.

Like said, if you see ANY smoke the DPF is junk... My buds 6.7 runs so clean the INSIDE of his tail pipe is actually rusting :D thats not right...

Yeah, like all of you have said......... I think its rather obvious that the Service "Advisor" is full of fecal matter.

Like all of you have said, I know there shouldnt be any smoke coming out of the exhaust.

BTW, I live in Houston and the only thing cold down here is my ole ladys backside when she gets in bed.

I changed my oil last night and also changed the fuel filter (since it was time) at a tractor trailer lube station and had my engine oil analyzed.

Fortunately, it told me what trace elements were in the oil. Unfortunately, the system didnt have the 6.7L in the system to do a proper comparison to say "good/bad".

It was apparent that I had a lot of junk / "gel" in the fuel filter and it looks like I am going to have to find a new place to buy fuel, but thats nothing to cry over.

Oh by the way......

If any of you are in the South Houston / Baytown area, I highly reccomend Truck King Truck Lube on I-10 East. The last time I had my fuel filter changed (dealership) it cost me $180 for the filter and labor. Then if you added an oil change youd be looking at another $50 to $85 or so. I am proud to tell you that I walked out the door with an oil change, new fuel filter, and oil analysis for a grand total of $111 and change.

Now I am by no means the sharpest crayon in the box, but where I come from thats a hell of a good deal. Plus, the techs were quick and very courteous.

Now before I start writing a book here, I want to ask you this. Do you think it could be a case of a dirty/clogged/malfunctioning injector? If you say yes, is that something that would show up when the ECM is read at the dealership?

Another food for thought... I have read several places that its reccomended AGAINST using fuel additives. Any opinion on this? If your in favor, is there one that really stands out and would help in cleaning out my injectors.

Forgive my ignorance, but I come from a world when cleaning the injectors involved filling a new fuel filter with automatic transmission fluid and then starting the engine.

And yes for those of you that think that is the stupidest think youve heard before, but it works like a charm (on older, simpler engines)

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Yikes, I almost forgot.

I have noticed no real change in my fuel mileage. And before the oil was drained (and allowed to sit for 10 minutes, the oil level was right where it should have been.

Thank you all for your help. Its greatly appreciated.

The reason for no additives is it will mess up the dpf. Take it off and run whatever you want for additives.