4DRonDUBS

I can't hear my v-tec and my friend told me to ground the black wire from the v-tec and run the other two to the ecu but it isn't working right. I can't figure it out, i don't know if i have it wired up right but i think i do when i runthe black wire to pin d3 on a p28 ecu my engine light comes on ???? so i grounded it again and the engine light shuts off??? help...... b7 block and d16z6 head 92 eg body