Regens at alarming rate!

[Se7enoverland]

How are you monitoring rail pressure and boost?

If it’s thru the OBDII port then you are seeing what the module wants the ECM to see, not what’s actually occurring in the motor.

While I don’t know the inner workings of that specific box it appears to be a fuel pressure with boost fooling. That means it will keep the boost reading lower so the ECM doesn’t cut fuel based on over boost and increase rail pressure to gain fuel and that’s how you gain power. None of the connections will effect timing, which is another way to gain power.

You cannot gain power with only connecting to the rail pressure and MAP sensors by lowering boost and not changing rail pressure. Fuel makes power, and there isn’t any added fuel with that equation.

Ok I get it everyone has their opinion. But with this module you can run it on stock setting, 30hp, 60hp and the truck will run 24hrs on ever regen. If I take the module off the truck my truck will regen ever 180-200 miles. So when the only data I see change is the boost to me it’s the MAP sensor. I have dealt wilt this for a year now and to get my truck to run smoothly with regens ever 24hrs I run the module and run it on stock or 60hp and I watch everything with a iDash.

 

[AH64ID]

Ok I get it everyone has their opinion. But with this module you can run it on stock setting, 30hp, 60hp and the truck will run 24hrs on ever regen. If I take the module off the truck my truck will regen ever 180-200 miles. So when the only data I see change is the boost to me it’s the MAP sensor. I have dealt wilt this for a year now and to get my truck to run smoothly with regens ever 24hrs I run the module and run it on stock or 60hp and I watch everything with a iDash.

With an iDash you are seeing what the AG module is telling the ECM, not real readings anymore. Therefore anything you see related to FRP or MAP is likely altered and not even worth looking at. Only likely because I don’t have personal experience. They are altered, I just don’t know how much.

The ECM hasn’t been reprogrammed so the AG module has to truck it. It does this by altering the signal to the ECM which in return results in more fuel. So for example if the stock tune is for 32 psi of boost at 28K rail psi the AG module will tell the ECM, and your iDash, that you are at 28 psi of boost and 24K psi of rail pressure. Boom, you instantly get more fuel/air in the cylinders to make the advertised power.

Bottom line, if your AG module is on anything but stock your boost and rail pressure readings are fake and both will be running higher pressure than indicated.

If that module makes a difference on stock then it’s not a stock setting, is it.

 

[DougB]

My PID has been in the 1300-1500 range for the last few months and I’ve only had 24 hour regens since Labor Day. I’ve seen nothing that would remotely indicate hours to the hundredth.

The 24 hour regen clock resets at the completion of a regen, so the PCM isn’t including active regen time in its 24 hour clock.

Finished my long trip today. Drove 1388mi since the last active regen. Since this trip was mostly highway driving the regen was triggered by the 24 hour clock, not soot. Went from 697 to 721 engine hours. During that time the soot reading got as high as ~30% on the DPF gauge during some mixed driving in middle of the trip. Could tell when the iDash started to track the time and not the soot as the iDash read 80 but DPF was around 30 and dropped from there during passive regen.

When the active regen started the iDash immediately went from 100% to 44% and the DPF gauge was at zero from passive regen as I’d been running 75-80 mph for a couple hours to drop it from the mixed driving 30% level. Regen took 23 miles which is pretty typical from earlier soot load started active regens. The iDash was at 42 when it stopped. A little while later after a fuel stop, it was mid 20s when I restarted but quickly moved back to 44-45 and stayed there while on the interstate in passive regen. DPF gauge never moved off zero for rest of trip. Plenty of passive regen on intestate.

Strangely, the iDash distance and time parameters between regens were way off.
748 mi
1124 minutes
I took photos of the engine hour screen and mileage at the end of the last active regen and again at the start of this 24 hour activated regen. 1388 miles. Wonder if that distance parameter resets at some other point other than an active regen start. The 748 miles would have been during the mixed driving part of my trip where the DPF garage started to move up.

 

[AH64ID]

Finished my long trip today. Drove 1388mi since the last active regen. Since this trip was mostly highway driving the regen was triggered by the 24 hour clock, not soot. Went from 697 to 721 engine hours. During that time the soot reading got as high as ~30% on the DPF gauge during some mixed driving in middle of the trip. Could tell when the iDash started to track the time and not the soot as the iDash read 80 but DPF was around 30 and dropped from there during passive regen.

When the active regen started the iDash immediately went from 100% to 44% and the DPF gauge was at zero from passive regen as I’d been running 75-80 mph for a couple hours to drop it from the mixed driving 30% level. Regen took 23 miles which is pretty typical from earlier soot load started active regens. The iDash was about 42 when it stopped. A little while later after a fuel stop, it was mid 20s when I restarted but quickly moved back to 44-45 and stayed there while on the interstate in passive regen. DPF gauge never moved off zero for rest of trip. Plenty of passive regen on intestate.

Strangely, the iDash distance and time parameters between regens were way off.
748 mi
1124 minutes
I took photos of the engine hour screen and mileage at the end of the last active regen and again at the start of this 24 hour activated regen. 1388 miles. Wonder if that distance parameter resets at some other point other than an active regen start. The 748 miles would have been during the mixed driving part of my trip where the DPF garage started to move up.

The iDash, or CTS3, or any other OBDII monitor, just report what the ECM has to say, so the ECM’s output on those PID’s is wonky at best. They just don’t work, IMO.

 

[DougB]

The iDash, or CTS3, or any other OBDII monitor, just report what the ECM has to say, so the ECM’s output on those PID’s is wonky at best. They just don’t work, IMO.

If they can’t measure distance and time accurately HTF can we trust them to get the DPF regen right?!?!?

 

[AH64ID]

If they can’t measure distance and time accurately HTF can we trust them to get the DPF regen right?!?!?

I just don’t think those PIDs have anything to do with the regen timing or frequency.

Distance isn’t a parameter for active regen initiation, but timing is and should be accurate… but it’s not.

That being said, it’s not accurate based on our understanding of it.. maybe the PID descriptions are wrong.

 

[DougB]

I just don’t think those PIDs have anything to do with the regen timing or frequency.

Distance isn’t a parameter for active regen initiation, but timing is and should be accurate… but it’s not.

That being said, it’s not accurate based on our understanding of it.. maybe the PID descriptions are wrong.

I understand they don’t trigger anything but how can they be so far off tracking distance and time when the odometer an MF engineer hours are dead accurate? If Ram added them to help troubleshoot DPF/regen issues, they’d need to be accurate otherwise why bother having them there.

And as I mentioned before, my lower time readings looked more like hours than minutes.

 

[AH64ID]

I understand they don’t trigger anything but how can they be so far off tracking distance and time when the odometer an MF engineer hours are dead accurate? If Ram added them to help troubleshoot DPF/regen issues, they’d need to be accurate otherwise why bother having them there.

And as I mentioned before, my lower time readings looked more like hours than minutes.

I simply don’t think they use them for anything and they are just there.

 

[DougB]

Now I’m interested what my regens will look like as I get back to my daily driving routine to see if the MAF reset and the ~1500mi trip did anything to help the adaptive tables. Will take a few weeks to see anything. Not expecting anything but would be nice to be surprised.

 

[Se7enoverland]

Now I’m interested what my regens will look like as I get back to my daily driving routine to see if the MAF reset and the ~1500mi trip did anything to help the adaptive tables. Will take a few weeks to see anything. Not expecting anything but would be nice to be surprised.

You regen miles and time is a running avg over the last not sure how many past regens. Have not figured that out yet. But they are a avg of you past few regens.

 

[AH64ID]

Now I’m interested what my regens will look like as I get back to my daily driving routine to see if the MAF reset and the ~1500mi trip did anything to help the adaptive tables. Will take a few weeks to see anything. Not expecting anything but would be nice to be surprised.

I haven’t done a MAF reset, so I’m curious if you think it helps.

I usually get 12 hours into a 24 hour cycle of my daily driving routine following a period of heavy towing before my DPF gauge moves.

 

[AH64ID]

You regen miles and time is a running avg over the last not sure how many past regens. Have not figured that out yet. But they are a avg of you past few regens.

My last 7 regens have been 24 hour regens, but the PID says 1530 min or 25.5 hours. That’s not correct.

I’ll need to look at the miles and see what they say. I’ll look and see if I can find a pattern, but I’m not optimistic.

 

[DougB]

You regen miles and time is a running avg over the last not sure how many past regens. Have not figured that out yet. But they are a avg of you past few regens.

Wholly smokes. Dead nuts accurate using last regen average plus the actual mileage I tracked for this regen.

108 + 1388 = 1496

1496 / 2 = 748. <— exactly iDash DPFDIS reading

Will try to track better and see if this is pattern or a really miraculous coincidence.

 

[mbarber84]

From what I’ve been reading on the programming and monitoring of the system, the internal counter that controls the time-based active regeneration isn’t necessarily counting time as we know it (in common units like seconds or minutes). The counter can actually change the speed at which it counts based on engine rpm and exhaust temperature. Since it changes speed it obviously can’t reflect data in time units. More RPM’s or higher EGT’s the faster the counter runs. It counts upward, not downward, and maxes out at 24000, which is when the time-based regeneration initiates. Alternatively you still have the soot-based regenerations as well. 47 grams estimated soot load is the threshold at which an active regeneration will be triggered. That counter actually continues to count up until the exhaust temperature reaches 850°F, at which point it starts counting down.

 

[mbarber84]

There’s a really well-defined write-up on the regen processes over at the TDR forums. The gentleman who did the write up seems very well versed in this process. Definitely opened my eyes to some things I was unaware of. The counter not counting in actual time units was interesting. You can read the write up here:

Regeneration

There has been a lot of misconceptions and misinformation posted on different threads about the regeneration process on the Dodge Ram Pick-Up with the...

www.turbodieselregister.com

 

[kfscoll]

There’s a really well-defined write-up on the regen processes over at the TDR forums. The gentleman who did the write up seems very well versed in this process. Definitely opened my eyes to some things I was unaware of. The counter not counting in actual time units was interesting. You can read the write up here:

Regeneration

There has been a lot of misconceptions and misinformation posted on different threads about the regeneration process on the Dodge Ram Pick-Up with the...

www.turbodieselregister.com

I read that post, and it was certainly enlightening, but it was also from 2009. How sure are we that the current regeneration system works the same way as it did back then?

 

[mbarber84]

I read that post, and it was certainly enlightening, but it was also from 2009. How sure are we that the current regeneration system works the same way as it did back then?

Not positive. That’s the problem.
I’ve been trying to get my hands on the detailed version of how the current system actually functions, but not having much luck. That 2009 write-up is exactly what I’d like to see but in the 2019+ systems. I would assume some of the regeneration parameters would be the same since regen is still the same process, but can’t confirm that obviously. Not even the dealership technicians have access to that level of depth from what I’ve been told.

 

[AH64ID]

Looked a little more at my PID regen miles and time.

647 miles and 1530 minutes are currently displayed.

1530 minutes is 25.5 hours, so it’s already bogus IMO.

Here is my data if I average the last 2,3,4,5,6, and 7 regens. My regen 8 times ago was a stationary desoot 7 hours after a regen, so it throws the time way off. These are miles from completion to completion.

2 regen average
770 miles 1440 minutes

3 regen average
665 miles 1440 minutes

4 regen average
585 miles 1440 minutes

5 regen average
679 miles 1440 minutes

6 regen average
667 miles 1440 minutes

7 regen average
676 miles 1440 minutes

If miles during regen aren’t counted and since I average 15-20 miles between regens the closest averages would be 3 or 6, but that still doesn’t account for time even if I use dash hours that don’t include decimal points I can’t get the time average up.

Life average is 711 miles and 22.7 hours (1362 minutes) between regens (using the whole hours the dash hour meter shows, so some 24 hour regens show 23 hours and some show 25, and even one at 26).

Not positive. That’s the problem.
I’ve been trying to get my hands on the detailed version of how the current system actually functions, but not having much luck. That 2009 write-up is exactly what I’d like to see but in the 2019+ systems. I would assume some of the regeneration parameters would be the same since regen is still the same process, but can’t confirm that obviously. Not even the dealership technicians have access to that level of depth from what I’ve been told.

Based on my own observations on my 2018 and 2022 truck I think quite a bit changed for regen parameters with the 13+ DEF/SCR trucks.

Our timer is 24 hours max, regardless of EGT/RPMs.

Passive regen seemed nearly impossible on that generation, according to the article, yet we know that it occurs on our generation with around 650°F and higher temps in the DPF.

Active regen only appears to have one cycle now and that’s around 1050°F max for the DPF. I don’t recall ever seeing over 1100°, and certainly not 1250°.

So while there are some very basic generalizations, I don’t think it’s really informative for our generation.

I’d love to see a modern version.

 

[mbarber84]

I’m trying to get a hold of one. Not an easy document to obtain.

 

[Sufdaddy]

I got my truck back from the dealer after the 9th check engine light for the DPF. They replaced the catalytic converter, DPF assy. As of 200 miles the filter shows empty or near empty, only once getting above 25%. I'm hoping for the best, though I'm also wondering if in another 15k miles I'll be going through the same nonsense again. Funny thing that when I got my truck back on Friday I received a recall notice about the DPF system. A long as it's working the way it did new I'm not going to have them mess with it anymore.

When I took it in I complained that the oil level way 3 quarts high and that it was because the oil in now full of fuel. They said that they emptied some oil to make it the correct amount but didn't change it since I'm not due yet. They said they will give me a free oil change when it needed. I'm not going to wait for that. Also they charged me 660 bucks for oil and fuel filter change 3500 miles ago and that was double what the oil change shop charged me. So, I'll just get the oil changed and deal with the filter when it's time.