Exhaust filter 100% full weirdness

[Newsa]

I don't care how many idle hrs it says, it totals hrs. On average I burn 3 gals an hr, including towing. Think before you answer the next question. Do you think your truck burns more fuel Idling than mine does working? You made another dumb excuse and got caught, AGAIN. When you're in a hole, quit digging. Just leave it at once more, you commented on a topic of which you have little to no actual knowledge, and it made look foolish.

3 GALLONS PER HOUR! Very impressive. :-laf

 

[Newsa]

I've found a really good PDF on this subject- explaining it all from combustion basics to technician intervention.
Bear in mind that if a Diesel engine is running, a DPF is accumulating soot. Comparing soot production along an engine's power/ fuel curve is just symantics. Also keep in mind that this was made for Volvo heavy truck, but newsa, you should be able to weed out what you want to know.

http://www.arrowtruck.com/pdf/ADeeperLookIntoDPF.pdf

Most of what is in this article about passive and active regen along with the how's and whys I already knew. Edit: except we don't have an after injection between the turbo and DPF, so our active regen is a bit different)

However, when it speaks of the Volvo system, it talks about the burnt ash after regen and how it collects in a canister. From the shape of our DPF, it doesn't seem to have a canister to collect the burnt ash (what doesn't convert to CO2 and water). But does the ash fall out of the ceramic filter to the bottom of the DPF? This is my question.... because before I took it in for a forced regen, I received a message that there was ash accumulation in the DPF. But really, it wasn't ash, it was unburnt soot.... because their manual forced regen took care of the problem.

What happens to the ash that is already fully burnt (in our trucks)? In Volvo big rigs, it falls into a canister, but nobody has really said what happens in our DPF's.

 

[jhenderson]

Not really, I drive a little fast. When plowing snow in parking lot type applications it's a little less than 2 gallons per hr. Wind resistance plays a tremendous part in fuel use.

 

[Jared Herzog]

Most of what is in this article about passive and active regen along with the how's and whys I already knew.

However, when it speaks of the Volvo system, it talks about the burnt ash after regen and how it collects in a canister. From the shape of our DPF, it doesn't seem to have a canister to collect the burnt ash (what doesn't convert to CO2 and water). But does the ash fall out of the ceramic filter to the bottom of the DPF? This is my question.... because before I took it in for a forced regen, I received a message that there was ash accumulation in the DPF. But really, it wasn't ash, it was unburnt soot.... because their manual forced regen took care of the problem.

What happens to the ash that is already fully burnt (in our trucks)? In Volvo big rigs, it falls into a canister, but nobody has really said what happens in our DPF's.

If i understand the process, and i could be wrong so please correct any misunderstanding, the ash accumulates in tube type chambers. The dpf is like a bunch of stacked dead end straws. Hundreds and hundreds of chambers. The soot is burned to ash and this ash piles into the horizontal dead end straw type chambers. As the ash accumulates these chambers become shallower until they reach capacity and the dpf needs cleaning. The stationary forced regen can turn more of the trapped soot to ash and extend the time before it must be either replaced or removed for cleaning.
As a part of the cleaning process a depth feeler type gauge is used to ensure these straw like chambers are cleaned to a depth that can make the dpf almost function as good as if it were new. Several chambers must be gauged to ensure a thorough cleaning was performed. If the chambers are not clear enough additional cleaning is needed.
This is how i believe the dpf ash process is handled.

 

[Newsa]

If i understand the process, and i could be wrong so please correct any misunderstanding, the ash accumulates in tube type chambers. The dpf is like a bunch of stacked dead end straws. Hundreds and hundreds of chambers. The soot is burned to ash and this ash piles into the horizontal dead end straw type chambers. As the ash accumulates these chambers become shallower until they reach capacity and the dpf needs cleaning. The stationary forced regen can turn more of the trapped soot to ash and extend the time before it must be either replaced or removed for cleaning.
As a part of the cleaning process a depth feeler type gauge is used to ensure these straw like chambers are cleaned to a depth that can make the dpf almost function as good as if it were new. Several chambers must be gauged to ensure a thorough cleaning was performed. If the chambers are not clear enough additional cleaning is needed.
This is how i believe the dpf ash process is handled.

Ok. Thx for your contribution.

I also wonder if the precious metals in the dpf can be recycled. Or if ours uses a different type of catalyst.

 

[Jared Herzog]

They must be worth something since people are still stealing them. Not sure what precious metal is in them though.

 

[TCDiesel]

Silicon carbide ........

 

[jhenderson]

If i understand the process, and i could be wrong so please correct any misunderstanding, the ash accumulates in tube type chambers. The dpf is like a bunch of stacked dead end straws. Hundreds and hundreds of chambers. The soot is burned to ash and this ash piles into the horizontal dead end straw type chambers. As the ash accumulates these chambers become shallower until they reach capacity and the dpf needs cleaning. The stationary forced regen can turn more of the trapped soot to ash and extend the time before it must be either replaced or removed for cleaning.
As a part of the cleaning process a depth feeler type gauge is used to ensure these straw like chambers are cleaned to a depth that can make the dpf almost function as good as if it were new. Several chambers must be gauged to ensure a thorough cleaning was performed. If the chambers are not clear enough additional cleaning is needed.
This is how i believe the dpf ash process is handled.

That is the process. Unfortunately, our trucks were not designed with cleaning in mind. Med and heavy duty systems are bolt together, not welded like ours and are much easier to service. I'm hoping by the time mine needs service an exchange program will be in place like it is for heavy duty trucks.

 

[Wayne M.]

Mr. Herzog has it square rooted. When those dead end tubes are breached, is when you see soot in the tailpipe or stack. At that point the DPF is damaged. Newsa, that particular Volvo system flows upward, and the bottom of the system is basically a pan, so it's possible for the accumulated ash to fall down into it. The exhaust entry is on the side. The extra hydrocarbon (fuel) comes from an extra injector, atomizer, or the engine itself (which is the case of pick up trucks). Bottom line is that you're using fuel to regenerate in any case.
True that your type of filter supposedly can't be cleaned, but medium and big trucks are meant to come apart and go through this---
http://www.fsxinc.com/site1/video/FSXTraining.html
This is the process we use.
It's worthwhile to note that I was told recently that Bully Dog came out with a replacement DPF for Ford 6.7's that come apart for cleaning like large trucks. I'll be floating that suggestion to my Management for consideration.

 

[TRAMPLINEMAN]

The T05 doesn't replace the DPF but there is a flash along with the removal of the ammonia sensor along with SCR cat replacement. TC could definitely elaborate better than I exactly what the flash does. My 14 was part of the recall so I'm pretty sure yours is included as well if you've got the ammonia sensor

Any idea where abouts the amonia sensor is? I’d like to check myself, but I’ve no idea where it is and search didn’t help much.

 

[JR]

It's actually a module, black with I believe two plugs. Located in the middle of the SCR cat. TC (or other more knowledgeable folks reading this) will correct me if I'm wrong but I'm almost 100% certain all 14 models came equipped with them.
When I had the T05 completed, they wanted me to schedule an appointment just so they could verify my truck was part of the recall. I told him I live an hour from the dealership and that just wouldn't work, and I would call around to find another option. He took my VIN, put me on hold for about two minutes, got back on and said yep your part of the recall. So they can tell by VIN rather than doing a visual like they will probably try and tell you.

 

[TRAMPLINEMAN]

If you know where the actual DPF is in the exhaust system, you'll see small tubes before and after it.

Ok, I attempted to remove and blow these lines out this weekend. Didn’t get very far. I could not get the metal tubes out of the DPF. With a two foot cheater pipe on the wrench it still wouldn’t budge. Even tried heating up the bung, still no turny. This is where I gave up. I can’t afford to break something and be down.

 

[TRAMPLINEMAN]

It's actually a module, black with I believe two plugs. Located in the middle of the SCR cat. TC (or other more knowledgeable folks reading this) will correct me if I'm wrong but I'm almost 100% certain all 14 models came equipped with them.
When I had the T05 completed, they wanted me to schedule an appointment just so they could verify my truck was part of the recall. I told him I live an hour from the dealership and that just wouldn't work, and I would call around to find another option. He took my VIN, put me on hold for about two minutes, got back on and said yep your part of the recall. So they can tell by VIN rather than doing a visual like they will probably try and tell you.

Thank you! Ya, I leave home at 4am and get back at 9pm Monday thru Friday. Swinging into a dealer just so they can look at it isn’t going to happen. I will be calling this week to try the vin option.

 

[Wayne M.]

Ok, I attempted to remove and blow these lines out this weekend. Didn’t get very far. I could not get the metal tubes out of the DPF. With a two foot cheater pipe on the wrench it still wouldn’t budge. Even tried heating up the bung, still no turny. This is where I gave up. I can’t afford to break something and be down.

If you find the other end, where the sensor is, you can just blow back.

 

[TRAMPLINEMAN]

Have you had the T05 recall done yet?

Dealer here just told me my truck does not apply to this recall.

 

[TCDiesel]

Check it out your self Here https://www.mopar.com/en-us/my-vehicle/recalls/search.html

 

[TCDiesel]

Here's the TSB

 

[TCDiesel]

Fca t05...

 

[JR]

Fca t05...

So it appears as though all 13+ came with the ammonia sensor, it's a matter of wether or not TSB 18-088-15 was performed.

Copied from your link -

If ammonia sensor and module are not present, Service Bulletin (TSB) 18-088-15 was previously completed on this vehicle. No further action is required. Return the vehicle to the customer, this recall is complete.


So that explains WHY a visual of the ammonia sensor is called for, although I'm still not sure why they request one over simply pulling the VIN up.

 

[TCDiesel]

Believe it or not FCA uses this site for records... So keep them updated.