Ecodiesel Regen Problems

[JoeGo88]

Looking for some help on my Ecodiesel. I have a 2014 Ecodiesel with GDE tune. I monitor EGT Sensors and Normalized Trigger to Regen on my OBD Fusion App. Recently my normalized trigger to regen fluctuates a lot going up and down. I've noticed when I'm on the accelerator my regen % will jump 20% or more temporarily until I am not accelerating as hard or coasting. Once off the accelerator the % will drop back down. This constant fluctuations causes the truck to be confused on regen and I think is creating more regens than necessary. I thought the % would only go up until it was time to regen. With OBD I have the message that will tell me I'm at 80% and a regen is happening. With the fluctuation sometimes I will get the message momentarily then it goes away if I am not accelerating as hard. I will then sometimes suddenly get a 50% completed regen and it may or may not continue to count down like a normal regen. I seem to be having to regen every other day with these constant changes. Hopefully this makes sense. I have cleaned all of the EGT sensors and Particulate matter sensor. Not sure how to test or see if one of those is the problem. Hoping someone else has had this issue or has knowledge of the system. What cause the % to go up on the Normalized trigger to regen? Thanks for any help.

 

[Farmerboy]

I don't have experience with that app, but can you see a value for the backpressure differential sensor? I'd be suspicious of a sensor playing up or a dpf that is plugged up with ash and not cleaning out properly. No engine codes? What miles?

 

[Dennetterville]

JoeGo88, I too use the OBD Fusion app to monitor my 2014 Eco JGC (105,000 km), and have the same problem you are seeing with the DPF % message fluctuating significantly as it approaches the 70% full mark. Most of my driving (95%) is in the city, causing the Jeep to do a Regen about every 120 km and/or 250 minutes of driving. Until about 6 months ago, the regens would complete after about 20 minutes of steady driving at around 30-40 kph. But recently the regens are not yet complete when the regen timer runs out after about 30 minutes of regeneration. My last completed regen was four attempts and 480 km ago, during which the DPF % always showed a steady 100%. City mileage is also crappy now, 15 L/100km whereas it used to be 11 L/100km.

No idea how to fix it, other than to finally install my SFT Stage 2 (full delete) tune that I've kept in the box for the past three years. I installed the SFT Stage 1 ECU/TCU tune (EGR Off) for the first time yesterday, and am enjoying its brisk performance and crisp shifting. Time will tell if the tune with EGR OFF increases the driving time and distance between Regens.