Check if all is properly spliced before you assemble together.Take your time. Unless gauge defective used or new. Easy way find friend who has local and test with theirs
I've got a 15 Gt premium auto went with the first write up everything working fine. Done when I first purchased thw car. Only thing went with the Ecoboost gauge to work with my Roush setup
.Wish i saw the earlier was just down there. Only flaw is gotta get another flange since you welded up to your manifold already. so this is just the piping correct.