I can totally see how that could occur, you are dealing with a computer controlled emissions system, just because it's not supposed to regen at idle doesn't mean there isn't a glitch causing it to, and with the kind of temps they generate during regen it is very believable that it could generate a flame. Also i see no reason to call someone out like that. But i would also like to see a video of that, it's got to be cool to see.

 

A leaky injector could be the root of the problem.

 

Considering that the DPF is in front of the muffler. This "flame" would have to be nearing 5 foot long to make it from the DPF thru the muffler, and out the tail pipe! I just have a hard time believing it. I'm not saying it isn't possible, but more like unlikely. The Fords were a lot closer to the outlet of the tail pipe if I remember and also had a separate injector.

 

Good greef some of you guys must of come from the ford site .All I asked was a question. I have been on this site longer then the smart *** making flaming spout offs ! I HAVE NEVER SEEN THE FLAME but have no reason not to believe my friend .used to be. you could ask an honest question and get help !

 

Not trying to be rude or make anyone mad at all. Just trying to make sense of it, or not, and voice my opinion as to why it is hard to believe. Hope you don't take offense. None was intended. Has he ahd the latest flash done to his ecm? I think , according to the TSB and RRT, that the first problems were for the trucks NOT doing a regeneration.

 

he said he has never taken it back to the dealer since he bought it.( told him that its not normal and somethings not working right ). ill find out tomorrow what dodge has to say .he said it was one of the first 6.7 the dealer got. the truck seems to run fine. but it has flamed 2x now, that he has seen (at night ).its not a long flame time its real short more like a ...for lack of a better description (poof) If it was a 1st or 2nd gen 12V -24V I could help but I never seen or heard of such a thing

 

The Ford has an injector between the turbos downpipe and the dpf to supply the xtra fuel necessary to the regeneration process. On the Dodge, the fuel is coming from an event permitting fuel injection at the opened exhaust valves cycle. I don't know exactly where down the pipe, the combustion take place to raise the temperature to a level necessary to burn the soot into ashes. To have flames coming out of the tail pipe, the fuel has to bypass / seep out the dpf. The muffler on the 6.7 is kind of straight pipe design and would not prevent any flames to come out. The dpf is like a labyrinth and for the fuel to burn pass the dpf it's either the dpf is cracked or defective inside or there is wayyyyyyyy too much fuel injected. Then again, this is just my theory since I don't know much about it. I would think the sensors would have throw a code of some sort but that could be defective also.
I also appologise if I offended somebody with my remark.

 

WEll said!



Did you guys know it takes near 150 to 300 complaints to get a TSB.....

I am looking for help with the 90,000 out rule Dodge has on ball joints.
Mine are 55,ooo out and the truck tire will move when jacked up and checked.
also it will now follow the lines in the road.


p.s.sorry to steal your thread!

 

Seem pretty simple to me. If theres any combustible matter left in the exhaust stream. Super hot gas+oxygen=flame.

 

Don't take this the wrong way, but I think people are underestimating the capability of the catalytic converter and the DPF. They both will burn off excess fuel, but the amount of fuel required to make a flame come out of the tail pipe after these two "furnaces" would be phenomenal. O.k. for an example, if a car with a gas engine has an ignition miss, or heck even 3 cylinders with no spark ( we'll say it is a v-8) , and all of the unburned fuel goes through the catalytic converter. Yes it gets really hot, hot enough to melt the inside of the converter, but has it ever been heard of to shoot flames? Especially on shoter vehicles with the catalytic converter closer to the exit of the tail pipe compared to the exhaust on our trucks ( Your trucks! Mine don't have that crud! ) Again, I'm not saying it CAN'T happen, just not very realistic considering the placement of components and the design of how it is intended to work. There is no "flame" involved in any of the process if it works as designed. And in my professional opinion, it would be hard to get a flame even if several sensors were out of calibration giving poor information to the ecm and creating ideal conditions for a flame. If I am wrong I will gladly admit it, I just need more proof. I don't see how it could ever happen.

 

Exactly. This is what a forum is for, asking questions and hopefully getting answers.
I see so much of this banter in the 3rd gen threads. Its immature. Everyone is so biased against other vehicles that they wont admit that its possible for a CTD to have any problems of any kind.
Yes, Ford had its little flamethrower problem but that doesn't mean it cant/wont happen to a Cummins. I mean, Id like to know of any flamethrower problems that might arise from a CTD cause my dad has a 6.7 and we'd like to keep up with info to keep our work truck investments in good working order.

Most people talk trash in forums because its just that...trash talked over a forum. 99.9% of trash talk in a forum wouldn't be said face to face with other forum member.


Done.

 

...Anf if it's not working as intended and if all the stars line up, could it be possible ?

 

I never said it was impossible. Just not likely! Yeah, I guess if Venus was aligned with Mercury and whatever . But really, I'm not an engineer , just a technician for the last 15 or so years, and I am just trying to figure it out in my head HOW it could happen, and can't see it happening. My biggest downfall I guess, is I have posted all of my thoughts, and catching flack over it. I don't think I've been rude, just brutaly honest. Like I said, I'm a big boy and will admit if I am wrong.

 

I'm not giving you hard time, I just trying to understand since it seems you know way more than I do. I don't know if Rebal's friend has any codes being thrown at him when flaming ? On an other post on this forum, other members have their 6.7 black clouding under certain condition but they have codes to refer to. Looks like a cracked DPF. Anyway, I'm looking forward for the results from the dealership investigating the flames.

 

I think we need to give vzdude the benefit of any doubt. He has posted a lot of helpful information on these forums(one of the few guys in my opinion who do so)

Anyhow, that's my $.02. I'll shutup now and let the flames fly