hey i got a disconected o2 sensor and it does not have a plug like the normal ones its got 4 wires from the car and 4 wires from the o2 sensor. what ones line up with what. from the car i got a black wire with a white line, a yellow with a black line, a off white almost gray wire, and a green wire. from the o2 sensor i have a gray, 2 whites, and a black. does any one know how these match up? please let me know thanks.