It's on the 3.8l T-Bird. It's the last wire I need to hook up before I give the car to my neighboor's kid (just turned 16... he's dying to get the car). The wire has comes from the wire harness on the passenger side of the motor, near the firewall. It comes off the harness right before the injectors, and is right next to the PCV. It's about 5" long and has a brownish looking wire.