High exhaust pressure

[lwilder27]

by thermostat housing do you mean the EGR differential pressure tubes? They have been cleaned.

During the regeneration analyzer test, it never commanded the EGR valve to open, so could a plugged EGR cooler still be the issue? My thinking being it wouldnt have any flow through the EGR circuit anyways, plugged or not.

Ill pull the turbo actuator and reinstall/calibrate and leak test the charged air circuit. If the turbo is closing harder than it should, would I be able to see that percentage command out of normal on insite?