Twin turbos humming on 6.4 diesel after removing pollution control but not all the time; is turbo shot with only 80K miles?
Who Knows? You modified this engine, removed pollution controls (spoiling the air we all breathe, you included) so how could any internet mechanic with no knowledge of your mods or proximity to the turbo know the answer.
If this truck is Rolling Coal, I hope the turbo IS shot.
I can’t second this enough…