Help please! Rpms fall and engine turns off

[Tacoboy]

@ka2.4et

fuel is a problem, a vacuum leak or boost leak will not cause the car to stall, it would run rough during idle your leaning out during deceleration, what setup do you have running? this could also be the problem of a open atmospheric bov, the engine cannot compensate for the dramatic lose of air, and the maf will mis calculate voltage load on the hot wire

dude, are you kidding? a vac leak will CERTAINLY cause a car to stall.