Yeah but its the angle of the bolt, youll see what I mean when you get to actually pulling it off. The iacv is a really easy pull and clean, sone have problems but they must have monster hands, lol. The maf can be checked by the volts, I believe you want .5v warmed up, not sure of the range tolerance but it can be checked if its functioning well with a multimeter, if not try thr reground and do your other grounds on the intake mani while your at it. I cant wait for the knock sensor to get to you so we can move on to getting your timing stable.