HEST light on too often...

[dbl overdrive]

I've never had much luck with the cutout test unless it was somthing real bad wrong on that cylinder.
Nearly every truck I've bubble tested that has had regen issues on has failed that test with at least one bad injector.
Dose the actuator catch up to the turbo position or are they just allways that far apart.
I think it's great that you are fixing your problems on that truck befor trying anything else if ya know what I mean.
I promote other options but prefer helping drivers fix it first. Sounds like you are on the right path.