Well, wife picked up the MH from Freightliner last week. They replaced the VGT Actuator - which I understand is the Turbo Actuator. They said that this would have caused the EGR system to become clogged, which was the problem that was initially repaired twice. It makes sense that the initial failures were symptoms of another issue because they said it was excess idling that caused the EGR system to clog, which never made sense since we don't idle much.
Now, I am still concerned that I am not back to normal power. I plan to do a test drive this weekend because the wife said it would lose 1 mph on overpasses (fully loaded with toad), which typically did not occur in the past.
I think I'm going to do a 100 mile test drive this weekend to see if it is reacting normally. I'll post if I find continuing issues but I hope we've gotten to the end of this saga.
Jody & Sylvia with our two mini schnauzers
2018 Tiffin Phaeton 40IH WITH F150 in tow
Formerly 2004 Holiday Rambler Endeavor 40PDQ