Yeah definitely have learned my lesson here. Don’t rebuild an injector you can’t pop test prior to install . It was so tempting though seeing the other guys getting by with it but I reckon lessons been learned here.While I have no issues rebuilding injectors from my Jimmy 2-stoke or old Ford compact diesel, I've never wanted to try these.
Anyway, for a reference sound, I looked through my videos, and the best ones to show are these. The in-cab was with the door closed, unfortunately. It also shows the difference of the faster running 6.4L starter. In both, you can hear the early production "bump."
Will replace my current starter w one of the 6.4’s my plan was put the stress excess cranking cycles until the truck runs then swap it with the new one.
As far as the early production bump , not sure what you mean in comparison to mine?