Hey guys, i was out messing with the aveo, and i was trying to hook up a autometer sport comp air/fuel ratio gauge i had laying around the garage. the problem is that im not getting any clear reading, im not sure that i have the right wire. can anyone tell me what color the 02 sensor signal wire is going to the pcm? i am pretty sure it is the black wire coming out of the 02 sensor pigtail, but when i am connected to that wire the a/f ratio gauge is jumping all over the place, from rich to lean back and forth, then when we rev the engine it will bounce back and forth again. mabye it will act diffretley under load. i wil;l probley try it tommorow under load