i have a 93 del sol si, and i think that my v-tec is not kicking in. i used to feel it kick in, and hear it kick in, now...neither. i had another engine put in, but it was the same thing (d16z6) but i don't think it's worked since i had that done. i also think my timing is off, but that's another problem altogether. anyway, does anyone have any suggestions on what might fix this problem? my car isn't fast anyway, but it could at least be faster than it is. i've heard several things could cause it, but never really been told what those are. any help would be greatly appreciated. thanks.