I don't know if this would be the problem you are having but is sort of close to what my crx went through with my b16 swap. If all your wires are correct and dist. is fine and vtec isnt crossing over check the speed sensor. My speed sensor went bad and my vtec did the same thing yours did. Also the circuits on the back of my cluster burned out and vtec didn't work because of that another time. Try to check those two things, I know it sounds odd, but on a odb-o car that was the issue. I could be wrong.