stock turbo?
i deleted my bov, it ran like jesus...my leaking bov netted me about 6-10 mpg
after i deleted it, i got about 27 mpg. not great for your turbo, but ehh

I also had the same issue when i was using a carter replacement fuel pump....drove fine until about 3k in boost, then it would lean out badddddd



ps: i asked if its stock turbo, just because i wouldnt run comp surge on a nice expensive turbo