87 TII , THERE'S A SENSOR ON THE FIREWALL NEXT TO THE CANISTER ON THE PASS SIDE. IT HAS A VACUUM LINE AND THREE WIRES THAT RUN INTO THE FIREWALL AN END UP NEAR THE ECU. THE WIRES ARE YELLOW BLUE AND GREEN. WHEN I REMOVED THE FCON,THEY WERE TIED INTO THE HARNESS. I DONT SEE A PLACE FOR THEM ON THE FACTORY HARNESS. COULD ANYONE TELL ME WHAT THIS IS AND WHERE THEY TIE IN. THE TOP OF THE SENSOR SAYS NIPPON DENSO.