Stationary Desoot with AlfaOBD

[AH64ID]

I plan to do a stationary desoot with AlfaOBD right before my oil change this month.

Who has done one?

How long does it take?

 

[MtnRider]

I've done one. I want to say it took about 45 minutes? But to be honest I didn't time it. I opened my hood and you are supposed to drop your spare tire but I had a big shop fan that I put at the rear of the truck and blew the heat away from the spare and it was fine. It will not run if you have any codes at all so they will have to be cleared.


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[gsbrockman]

I think there’s DEF minimum fluid level requirements as well as diesel fuel minimum level requirements.

 

[TFucili]

I think there’s DEF minimum fluid level requirements as well as diesel fuel minimum level requirements.

Greg, does your C&C have the magic button?

 

[JR]

Definitely start off with more than a 1/4 tank....there is a minimum, in gallons IIRC, and if it reaches that threshold anytime during the desoot it will abort.

I was at just under a 1/4, I'm talking a needle width and come up short the first time I tried.

I didn't drop my spare either. I did periodically check it and didn't get warm at all.

I think the length of regen depends on how plugged your dpf is.

 

[AH64ID]

Thanks guys, seems easy enough.

 

[MtnRider]

Thanks guys, seems easy enough.

Yes, it's pretty straight forward.

Just for future/historical reference on this subject....

In my case My truck had popped up the DPF full message on the EVIC (has done it once or twice before over the life of the truck) but this time it would not initiate a regen for some reason? Started dinging at me every few minutes that it was full but could not regen?
What I ended up having to do was go into alfa and do a DPF reset to clear it. That cleared all the stored % values as if I had installed a brand new DPF. Then I was able to start the stationary desoot.

I use Torque pro to monitor the DPF % full and see when the normal regens occurred. It is usually pretty linear from the time of a regen to the next as it "fills up" if you will. After resetting the DPF and doing the stationary de-soot, monitoring the DPF percentage as I did before seemed more erratic and not linear? Maybe it was trying to build it's data base again that I had cleared but not sure?
I ended up pulling off the DPF and honestly it didn't look horrible inside but really hard to say if it was clogged in the middle or something?

 

[AH64ID]

@MtnRider what year is your truck?

 

[MtnRider]

@MtnRider what year is your truck?

2016 with 69K. This all happened 3 weeks ago. Been trouble free up to this point.


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[JR]

Speaking of regens.

I listened in on an ASE webinar last week on Rams fuel and emissions system. Alot of good info, but one thing really caught my ear. The gentleman claims these trucks are performing an active regen every 300 miles. I know from watching my dpf inlet it's nowhere near that frequent. I've heard every 20 hrs which seems about right to me. I'm going to start monitoring it and writing hours/miles down. I've also reached out to the gentleman that put on the webinar for clarification.

He was speaking on the new trucks and the programming is likely different from mine but I'd be shocked if they are performing regens that much more frequently now. It seems to me it would drastically shorten the life of the dpf.

If he responds I'll follow up.

 

[MtnRider]

Speaking of regens.

I listened in on an ASE webinar last week on Rams fuel and emissions system. Alot of good info, but one thing really caught my ear. The gentleman claims these trucks are performing an active regen every 300 miles. I know from watching my dpf inlet it's nowhere near that frequent. I've heard every 20 hrs which seems about right to me. I'm going to start monitoring it and writing hours/miles down. I've also reached out to the gentleman that put on the webinar for clarification.

He was speaking on the new trucks and the programming is likely different from mine but I'd be shocked if they are performing regens that much more frequently now. It seems to me it would drastically shorten the life of the dpf.

If he responds I'll follow up.

Yeah, not buying every 300 miles. I've monitored mine for 2 years and they happen around the ~900 mile mark give or take. It varies depending on the type of driving I have been doing. Time wise it was around ~28 hours per regen give or take? This is on a 2016 for reference.


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[AH64ID]

My '18 does a regen every 24 hours of runtime, regardless of mileage.

I first learned about the 24 hour runtime regen last Labor Day and in the last year I have not had any regens more frequently than 24 hours. I've had a couple of active regens hit during or right after all day towing, they don't take long

My log is at home but I have note here that I had a regen at 586 hours/20,316 miles. I am currently at 668 hours/23,393 with my last regen at 658 hours, thou I don't recall the miles, but it was probably around 22,900.

Since 586 hours I have had 3 active regens and covered 3,077 miles.

 

[TFucili]

He also said they consider 500 regens a normal service life for the DPF before the ash trap is full.

 

[MtnRider]

He also said they consider 500 regens a normal service life for the DPF before the ash trap is full.

At the rate mine was regening that would be roughly 450,000 miles.


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[AH64ID]

He also said they consider 500 regens a normal service life for the DPF before the ash trap is full.

12K hours... I think I'll be good.

 

[gsbrockman]

Greg, does your C&C have the magic button?

No......but I’ve noticed that feature on some window stickers on 2019 and newer Cab & Chassis trucks.

 

[Ozymandias]

He also said they consider 500 regens a normal service life for the DPF before the ash trap is full.

Sorry that is nonsens spoken from that guy, it totally depends how much soot is in the DPF prior to regen.
And as we know the regen happens independent from the filling state of the DPF.
It depends also on the fuel quality, air filter quality and type of engine oil.

So 500 is no more then ballpark, can be 5000 as good as any other number.


*people with non-stock air filters will reach that threshold way faster.
As everything that passes the air filter will be collected in DPF.

 

[TFucili]

Sorry that is nonsens spoken from that guy, it totally depends how much soot is in the DPF prior to regen.
And as we know the regen happens independent from the filling state of the DPF.
It depends also on the fuel quality, air filter quality and type of engine oil.

So 500 is no more then ballpark, can be 5000 as good as any other number.


*people with non-stock air filters will reach that threshold way faster.
As everything that passes the air filter will be collected in DPF.

Well, he is an FCA Area Operations Training Manager, so what would he know?

 

[Ozymandias]

Did you actually read what I've written?
There is no such number, it is impossible to provide such a number with how that regen system on our truck works.

IF it would ONLY regen when the DPF back pressure indicates a full filter - THEN this number would be more or less credible.

But with our system it just doesn't, and it makes no difference if he is an FCA Engineer, then he himself don't understand how his own vehicles work.

 

[TFucili]

Did you actually read what I've written?
There is no such number, it is impossible to provide such a number with how that regen system on our truck works.

IF it would ONLY regen when the DPF back pressure indicates a full filter - THEN this number would be more or less credible.

But with our system it just doesn't, and it makes no difference if he is an FCA Engineer, then he himself don't understand how his own vehicles work.

I read they have a CP4 conversion for your Third Gen.