air fuel gauge problem

[ball_silly]

has anyone put a air fuel in there 4cyl coupe yet if so what wire did you use cause im having nothing but problems or i heard in sum new cars you cant put one on i do car audio with basic mechanic skills hopefully this is possible thank you

[Scandinavian Flick]

aren't you supposed to splice into the negative wire off of the O2 sensor

[ball_silly]

yeah we have 4 of them thats wires to the o2 i could have a bad gauge to im not sure yet but ive tried all 4 got nothing so im clue less now

[Scandinavian Flick]

you tried all four and nothing. did you make sure that the other wires to the gauge are all attached securely,

not to sound overly unintelligent but how many 02 sensors are on the 4 cylinder?

[ball_silly]

not sure on that one havent changed the exhaust yet its on the way

[adidas2go]

I believe there are 2 O2 sensors on the 4 cylinder. Im pretty sure the a/c uses narrowband o2 sensors and you need a wideband to measure the a/f ratio accuratly. However, Im not entirely sure.