Regen for 5th time today & failed

For sure multiple problems with this unit. That many unsuccessful regens isn't normal. Normal on a 2010 EPA MX would be Regen every 24 engine hours. The EPA 2010 used more EGR flow vs newer ones. Probably/most likely needs an air management sensor/pipe service as stated to start with. If the doser isn't plugged, then I would say the DOC face is! This is all guessing but you probably have a bad injector also. This can be verified with DAVIE and SCR overview road test. Plenty of good MX guys out there @ dealerships, but they are working probably a loyal customers truck. Technician shortage is greater issue than driver shortage.

 

Unfortunately I have been to many qualified shops with my EPA truck. They were slowly bleeding me dry. I found Rawze.com and started reading and buying tools. It is my truck, so I better learn how to fix it.

I just in framed it a few months ago, due to the fact that the “Qualified Shop” that in framed it two years ago installed 450hp ST CM-2350 internal parts in my 600hp CM-871. The only reason I discovered this is that they were supposed to machine the liner steps in the block for the new liners... Well, the “Qualified Shop” lied and the #5 liner fretted and took out my new head. Pretty obvious at that point that they never machined the block as I had demanded they do.

They wanted me to bring the truck in, no way were they touching this motor! I figured I know which end of a wrench to use, so I must be qualified enough to in frame a motor, and that is exactly what I did. Off to see Rawze, he helped me at his house, in the driveway... I brought my tools, he machined the block and helped me set the liners and install the pistons and head... Something I would not look forward to doing again. But, it was done right and by the book. Cummins Quickserve, it’s all there for free.

What is sad, is that many steps in the original in frame were skipped, or just ignored. We figure the motor had maybe 50,000 miles left on her due to the poor quality of the workmanship of said, “Qualified Shop”. A licensed Cummins repair facility with Cummins trained mechanics.

 

Good on you for digging in yourself. As you know not everyone has that ability.

If the work performed was really that bad, clearly the location of service you chose was not qualified. Often the tech performing the repairs may not be qualified, due to lack of techs as @spsauerland already stated.

 

There's a multitude of technicians out there , no shortage there.
However there is a massive lack of real mechanics.

 

Same could be said about drivers as well.

 

Not 'could' , can. Lol

 

I don't work on Paccar engines, so I don't know the specifics of that design. But, with Internationals, we make sure the engine is healthy first, proper boost, back pressure, fuel pressures and so on. Then we look at the after treatment to see how it is performing. We can measure how plugged the DPF and DOC is, we can see how healthy the DOC is by any trace smoke and temp increase across the system during a regen. Sounds like you have had everything looked at but the DOC. Frequent regens are normally plugged beyond reuse DPFs and/or DOC that are degraded and no longer produce temps hots enough for a proper regen. If the engine doesn't run right or has lack of power, that really needs to be addressed because pumping extra soot out the of the exhaust will just continue this downward spiral.

 

no exhaust leaks. the dpf needs every ounce of heat to function properly. at least thats what ive found... so any smoke anywhere will eventually be a problem and it sound like it already is part of the problem.

 

Do you still need help? I need more info: Do you have a DAVIE laptop?

 

no i think it was somebody else that needed help.. i do need help but not in the Paccar area..