I dropped a D15y8 (i believe) non VTEC Block into my 93 civic hatch. I put a d16y6 VTEC Head on it. The car is a VX model so it originally had a VTEC engine in it. Therefore the wiring harness and computer are VTEC ready. PROBLEM IS that the VTEC isnt working. It even has a VTEC Control module hooked up to it. Any help would be nice please. Ive had a mechanic at a performance car garage tell me that theres a port for oil flow in a VTEC Head thats not in a non VTEC Head. Any information would be nice please. Thanks.