Surging back after a few days, not as strong as before but it happens on random, even

[Nycxjeremyy]

I'm not sure what at this point, the surge went away after a few days but it came back (although not as strong as before) it tends to happen when I let off the throttle, any suggestions would seriously go a long way, im about to give up at this point



Video: https://www.reddit.com/r/Diesel/s/ETzQw2xfxa