DPF Issues

Glad it worked for you. However after so many regen cycles it has to come off and be cleaned/vacuumed at the shop. How many miles since it's been cleaned by a shop?
Does your truck use coolant/oil?

 

I have no experience with DPS systems other than with CAT C15 ACERT motors.

Typical problems like you indicate. There can be a multitude of reasons why the filter will get to the point where the ECM de-rates power and you are forced to seek out the assistance of a shop.

You stated yours seems to be RPM related. This could also be fuel related in your case. Yes it does need RPM's to burn off the soot,.. but its not just the RPM's. There is an injector that sprays fuel directly into the exhaust with an igniter that does exactly what it sounds like,.. it sets the exhaust on fire. If your cruising at say 1350 - 1400 RPM with a load,.. the engine may be lugging and unable to get enough fuel pressure to the injector. This could also be from a fuel filter or fuel pump problem.

I was in a very problematic truck and saw pretty much the entire gamut of diagnoses and solutions performed in order to fix the problem. Everything from upper sensor, lower sensor,.. ECM replacement, ARD head replacement, DPF replacement, fuel lines, different brand of filters, fuel pumps, turbos,..like I said,.. this truck was a money pit. Not my truck thank God.

I am glad that worked for you. But I have tried that,.. and did not work for the truck I was describing. To me it just means your problem stems from something else. I would definitely get it looked at and tell the shop what you experienced. Hopefully they have someone with competence who can apply that to the diagnoses and come up with a proper solution. There is no reason a DPF truck should not be able to perform a rolling regen under load.

Hurst

 

Its a double edged sword. Burn more fuel (money) to keep the DPF system happy and reduce shop costs,.. or save fuel (Money) and see the shop more due to DPF issues. I dont see why it shouldnt just let you do a manual regen when it needs one. That would often solve my problem or at the very least buy me enough time to deliver my load and then see a shop after.

I dont believe I will ever own an emissions equipped truck,.. and especially now with my desire to avoid ELDs also,.. means a much older truck for me. Thats just my personal preference. I understand the implications involved with operating an older truck. Mine has almost 1.4 million now,.. I got in it at 875k. Once I got on top of the maintenance and repairs,.. its been a very reliable truck. (Knock on wood). So another truck,.. another lengthy session of getting the bugs worked out and getting on top of everything. At least I'm not going into it with the illusion that everything will be chocolate bunnies and plastic pink flamingo's.

Best of luck to you brother.

Hurst

 

The new truck are getting better. My 2017 Freightliner with DD13. Can do a parked regeneration automatically. The truck has the Optimized Idle, so when sleeping or during 34 hour reset. The engine will start automatically to recharge batteries or engine oil temp or heat or cool sleeper. When DPF is full from idling the computers will Regen DPF automatically. Now they do a Regen at 1350 RPM and only takes about 20 minutes. You don't have to do anything

 

We are having a lot of Re-Gen problems with a variety of units. Penske is telling us that a parked re-gen isn't over when the lamp goes off but instead to wait until the engine shuts down on it's own after the lamp goes out.

We have a lot fewer problems now.

 

The guy I used to work for went to The Maintaince Counsel meeting this year. One of the ideas bounces between maintaince people this year was to cut the horsepower back on the engines to force them to work a little harder and run a little hotter.

 

That makes no sense. Cutting power capacity is not going to make an engine run hotter, quite the contrary.

 

Thats my thinking.

On a gas motor, the more power you put out the more cooling capacity you need to keep it from burning up.

I can only assume the same applies to a diesel.

Hurst