More Soot with EGR deactive?

[rharr]

If one was to do a sniff test (aka dyno roller with sniffer up tail pipe) for smoke opacity only, no OBDII reads, would disabling the EGR system cause more soot creation? DPF and SCR remain active.

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[Gregj]

The DPF should filter all the soot out. No personal experience but that is the DPF’s purpose.
Gregj

eta the EGR is to reduce the NOX which is why tunes that turn off the EGR use more DEF.

 

[Sbro2021]

EGR is there to do one thing, reduce the amount of oxygen in the combustion cycle to reduce combustion temps which lowers NOX. And I guess destroy the engine prematurely from all of that soot going right ahead of the filter right back into the cylinders.. Can confirm, had to replace the intake already..So two things.

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