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Regens at alarming rate!

Dodgeman said:
How are you getting the miles since last regen? Are you just monitoring the DPF screen and recording the mileage?

Thanks.
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I watch my DPF gauge religiously, especially since I’ve noticed this issue. It started when my dealer gave me the wrong engine air filter (68517554AA) and I noticed my truck wasn’t operating correctly. It was regenerating more frequently. I take a picture of the screen when it goes into regeneration. Then take another pic of the screen when it finishes. This keeps track of the time it starts and stops, as well as the mileage. I do the same for engine hours. When I get home, I enter the data into a Google sheet I created which automatically calculates the data. IMG_3894.jpeg
 
Good luck getting parts. GM and Stellantis warehouses/distribution centers are out as part of the UAW strike so unless they have the parts or can get them aftermarket you may be in for a long wait.
 
CaptainMike said:
The tech said they found an air leak on an intake manifold tube that they think is the culprit. Parts are on order and will hopefully be here this week. I'll get more precise info and exact parts and numbers when I go back and IF that fixes my issue. Fingers most definitely crossed...
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Interested to see more info on this…
 
mbarber84 said:
I watch my DPF gauge religiously, especially since I’ve noticed this issue. It started when my dealer gave me the wrong engine air filter (68517554AA) and I noticed my truck wasn’t operating correctly. It was regenerating more frequently. I take a picture of the screen when it goes into regeneration. Then take another pic of the screen when it finishes. This keeps track of the time it starts and stops, as well as the mileage. I do the same for engine hours. When I get home, I enter the data into a Google sheet I created which automatically calculates the data. View attachment 63301
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Very nice. Thanks for the info. I have OBDLink with the OBDLink MX+. A RAM PID reports "hours since last regen" but nothing for "miles since last regen". There is a PID that reports average miles between regens but that would not be very useful in this case.
 
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Well, took the truck in this morning for regen issues and recalls. Recalls done, except grid heater, no parts available. Tech said that I have a bad DPF sensor, so part is ordered. Of course unavailable yet again due to the strike. America is FUBAR, we can't even acquire parts anymore.
 
Firebird said:
Well, took the truck in this morning for regen issues and recalls. Recalls done, except grid heater, no parts available. Tech said that I have a bad DPF sensor, so part is ordered. Of course unavailable yet again due to the strike. America is FUBAR, we can't even acquire parts anymore.
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Confirmed bad sensor?

Or suspected?
 
mbarber84 said:
Confirmed bad sensor?

Or suspected?
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I was told bad sensor, but with dealers these days, anyone's guess is good. I don't have any paperwork, since it's an open ticket.
The truck did go into regen today, and it completed to zero, so at least it's not going into limp mode
 
Old, but still somewhat relevant. I wonder how many problem children are in regions that run blends of bio.

“Filter regeneration rate measurements indicate that biodiesel causes a significant increase in regeneration rate, even at the 5% blending level.”

 
flan said:
Old, but still somewhat relevant. I wonder how many problem children are in regions that run blends of bio.

“Filter regeneration rate measurements indicate that biodiesel causes a significant increase in regeneration rate, even at the 5% blending level.”

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Great question. I've never run it before, as it's really not available in my area
 
flan said:
Old, but still somewhat relevant. I wonder how many problem children are in regions that run blends of bio.

“Filter regeneration rate measurements indicate that biodiesel causes a significant increase in regeneration rate, even at the 5% blending level.”

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I’m in Pennsylvania. State law says that every gallon of diesel sold in the state must contain at least 2% biodiesel. I noticed recently that Sheetz fuel stations have a makeshift sign on their pump’s indicating that their fuel is between 5% and 20%:IMG_2913.jpeg
I’ve since stopped fueling at those stations. I’ve already noticed my truck seems to run a little better. Regeneration has improved ever so slightly but still not enough to where I’m comfortable with its performance. I still feel like it’s happening more frequently than it should be, especially considering 3,500 miles ago, I was achieving 800-1000 miles between regen cycles consistently.
 
mbarber84 said:
I’m in Pennsylvania. State law says that every gallon of diesel sold in the state must contain at least 2% biodiesel. I noticed recently that Sheetz fuel stations have a makeshift sign on their pump’s indicating that their fuel is between 5% and 20%:View attachment 63364
I’ve since stopped fueling at those stations. I’ve already noticed my truck seems to run a little better. Regeneration has improved ever so slightly but still not enough to where I’m comfortable with its performance. I still feel like it’s happening more frequently than it should be, especially considering 3,500 miles ago, I was achieving 800-1000 miles between regen cycles consistently.
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Were you the one that stated “back on “xx” date something changed with my truck and I started regenning more frequently” or am I confusing you with someone else?

I wonder if the switch to the higher level of bio was at that approximate timeframe...
 
flan said:
Were you the one that stated “back on “xx” date something changed with my truck and I started regenning more frequently” or am I confusing you with someone else?

I wonder if the switch to the higher level of bio was at that approximate timeframe...
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Yes that was me.
I had been using Sheetz fuel since the truck was new. So I don’t think the higher percentage of biodiesel was the cause of the change in regeneration frequency, although it may not be helping either. The significant change happened between 6/27/23 and 7/7/23. Prior to 7/7, the truck went 1,053 miles between regeneration cycles. On 7/7/23, the truck ran a regen cycle at only 328 miles since the last one. It has never really recovered from that one. I’ve only been able to accomplish 250-400 miles at most since that date. IMG_3888.png
 
Quick update. It's been 2 days since my truck was in the shop where they found an air leak in the intake system. They did a temporary fix and ordered replacement parts, and the temp fix seems to be helping things a lot. The DPF gauge in the EVIC has been steady at around 10% which is a nice improvement over the last 6 weeks or so. I'll take it for a long spin tomorrow and see what's what.
 
CaptainMike said:
Quick update. It's been 2 days since my truck was in the shop where they found an air leak in the intake system. They did a temporary fix and ordered replacement parts, and the temp fix seems to be helping things a lot. The DPF gauge in the EVIC has been steady at around 10% which is a nice improvement over the last 6 weeks or so. I'll take it for a long spin tomorrow and see what's what.
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Following along. Still want to see info on where the air leak was.
 
Prob one of the intercooler hoses. Pass side by the oil filter has been an issue in the past.
 
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