it would be uncalled for if I didn’t know for sure… I do. So I’m simply stating fact…
Your vacuum reading is from the plenum, the BOV works using pressure differential , when IC pipe and plenum are in balance then it stays closed… when the IC piping has more pressure then the Plenum, the BOV will function, where you set the BOV to ’ blow’ is the only parameter you have control over… ‘T-ing’ off another sensor is not good either.