In interest of adding my .02 c.

I was having the same issue this past winter, even so bad as the truck was choking down and blowing black smoke on each surge.

It had never done it before and has been tuned since 2017.

My solution was a 2nd Gen swap.

I did notice a fair amount of shaft play when the oe turbo was removed.

The truck has 114000 miles on it. Perhaps wear/loss of efficiency somewhere is the culprit?

Sent from my SM-G973U using Tapatalk