Time for a DPF bake? Excessive and long rolling regens

Sounds like it’s time for a bake.


On a serious side note, you need to stop idling all night asap. Those paccar engines will die quick because of it. Idling is the silent killer on Diesel engines.

 

Unfortunately I don't have an APU so I have no choice but to idle during the warmer months if I want AC. Hopefully in spring I'll be able to get one. I don't idle much in the cooler months, i like the cold, I'm fine down to 30f without my bunk heater.

 

Few times now checking for leaks while it was smoking. Side panels off, even crawling under the truck. All the clamps are tight and there's no soot/dirt build up indicating a leak.

Only leak I've found so far was a small one in the engine, seemed much to small to produce the billowing smoke.

This bottom valve between the turbo and exhaust (egr?). Small amounts of smoke puffing from behind it under the pipe.

 

check those clamps that connect the pipes together... best way to check is after ur truck has been sitting so all pipes are cold.. then startup and spray with soap and water and watch for bubbles.. you can still do it when its hot but the soap exaporates to quickly

 

bake ? no...
hot water and brick acid(or pool acid -32%) will clean it good and fast.

 

Just got my truck back from its Annual Safety. Drove around 1100 miles and now the engine light came on. Peterbilt told me it could be the sensor and how much I idle the motor and I don't idle it at all really. I was reading online that the DPF needs cleaning or replacing arouns 200k miles but my truck is around 175k miles. Another truck mechanic checked and said it isnt crystallizing and looks clean so I'm wondering if I should just get the sensor changed? I'm now wondering if it will derate however, if it not clogged why would it?

 

So did Pete hook up and diagnose it? If not why not?

I see a 567. Cummins or MX.

Need faults and regen history report to be of any real help. DPF pressure sensors do have a high failure rate.

 

MX13, yes they did a quick diagnostic reading when I was in Ohio. After you mentioned the sensors having a high failure rate I'm starting to think that's what it may be.