Doc Face Plug Clean?????2

[lesvraissavent]

I have Intake Manifold Pressure Too high code, Nox Conversion Low and Poor Def, I was recommended egr clean, before that I went to DPF specialist to change outlet nox sensor because it was drifting and he ran a regen and he keeps saying the numbers seem correct and that I don’t need a egr clean up, but what caught my attention was the high doc inlet pressure on my truck as the regen started it was at 1.595! I don’t know if it went down or not at the end of the regen but assuming it didn’t go down, plugged doc could be causing intake manifold pressure too high? As well as nox conversion low? And poor def quality?

I insisted maybe I need doc face plug cleaning again the dpf professional said, I didn’t see anything wrong and he doesn’t believe I need doc cleaning.

If I do doc face plug cleaning is there a risk to that?

Could this be the solution to temporary fix?

He said egr was not acting up and temps were good so I don’t know if I should clean egr first or do face plug cleaning

I’m going to attach some pictures of the numbers at the beginning of the regen where you can see the doc inlet pressure at 1.595 which is high I wasn’t able to see the ending numbers so I don’t know if it went down or not.

[lesvraissavent]

Outlet nox sensor is high because it was drifting so after the regen I changed,

[lesvraissavent]

My question is can doc face plug be causing intake manifold pressure too high, nox conversion low, and poor def? Should I insist the dpf guy to do doc face plug cleaning?

Is there a risk to doc faceplug cleaning

[RollinCoal]

I recommend following the tuneup procedure for the cummins,
Any diesel engine with aftertreatment system can benefit from it

Not really a risk in the face cleaning it dumps a ton of fuel in it tho
And the sensor problems very well could have caused the plugging

[lesvraissavent]

Could the doc pressure be high because of the clogged dpf filters?


And could the doc face cleaning push the doc toward dpf or is that rare? Thanks for the reply brother

[lesvraissavent]

I have Intake Manifold Pressure Too high code, Nox Conversion Low and Poor Def, I was recommended egr clean, before that I went to DPF specialist to change outlet nox sensor because it was drifting and he ran a regen and he keeps saying the numbers seem correct and that I don’t need a egr clean up, but what caught my attention was the high doc inlet pressure on my truck as the regen started it was at 1.595! I don’t know if it went down or not at the end of the regen but assuming it didn’t go down, plugged doc could be causing intake manifold pressure too high? As well as nox conversion low? And poor def quality?

I insisted maybe I need doc face plug cleaning again the dpf professional said, I didn’t see anything wrong and he doesn’t believe I need doc cleaning.

If I do doc face plug cleaning is there a risk to that?

Could this be the solution to temporary fix?

He said egr was not acting up and temps were good so I don’t know if I should clean egr first or do face plug cleaning

I’m going to attach some pictures of the numbers at the beginning of the regen where you can see the doc inlet pressure at 1.595 which is high I wasn’t able to see the ending numbers so I don’t know if it went down or not.

[tree98]

Why don't you do an egr tuneup and also drop the cans to have a look at them/get them baked instead of guessing about what might be going on. Your gonna have to do these things yourself because any "DPF professional" you find is gonna likely be a waste of time and money.

[lesvraissavent]

What is a egr tune up brother? Could that be causing the doc inlet pressure high?

[tree98]

https://youtu.be/FhJxpyS5MpY