so I'm trying to conect my air/fuel gauge but can't figure out wich wire it goes to. I'm connecting it down by the ecu and the manuls say it goes to a gy (green/yellow wire) but wich one, my car is sitting apart right now so the sooner some one can answer the sooner my car gets running, thanks

 

just run it through the fire wall and find the one wire comming out of the 02 sensor