Grain, does your a/f guage go from rich, to way lean, then right back to rich again?? is it kinda make the car studder going from vac to boost? i get this as well, i too have the missing link. i wonder if these are related. its so weird to see it go from all the way rich to all the way lean then right back up. i'm going to mess w/ my settings on the 8 inj setup but this would explain the weird reaction i see in my a/f guage and the hesitation going into boost.