O2 Signal wire

[89LX-XB1A]

I have a 89lx 5.0. does anyone know which wire is the signal wire going into the ecu from the O2's? I'm trying to hook a A/F gauge up and dont want to do it off one O2. So im trying to tap into the cars ecu but no one around here seems to know which wire is the signal wire.










89 LX- D.S.S 306, Xb1a 10p.s.i., Gt-40 Alum.. heads, Ford racing F cam etc.....

[toyman]

Originally Posted by 89LX-XB1A

I have a 89lx 5.0. does anyone know which wire is the signal wire going into the ecu from the O2's? I'm trying to hook a A/F gauge up and dont want to do it off one O2. So im trying to tap into the cars ecu but no one around here seems to know which wire is the signal wire.

Pin 29 (O2 right) or pin 43 (O2 left) but why bother. The narrow band O2 sensors will not give you any meaningful readouts above or below 14.7 AFR which is why you need to install a wide band system to accurately measure the AFR. Sometimes there are no shortcuts.