[dogwater]

Maybe this can help someone.I have a barely used O2 sensor that Im going to put into my Camaro.I have one of those green,yellow,red o2 gauges (its a wide band) .The o2 sens.is a Bosch 4 wire,didn't know what wires were what so grab my v/meter the 2 white wires are the heater wires,they had resistance.The gray & black wires read o2 gases,gray is for the gauge,black is ground.When I put my meter on the gry. & blk. wire an ohm. them,it was open,so I applied heat to the working end of the sens.,changed meter to read voltage an got some low voltage readings.Im only using one o2 sens.I welded in one of those chingadaras for spark plugs, anti fouler things, use a 14mm.I welded it into the collector facing upwards.I don't see a need for a narrow band gauge if all your using it for is to get your carb. into the ballpark.Its been a big,big help in understanding & tuning the carb. Gauge was around 30.00,anti fouler was like 8.00, 02 sensors are (really all that is needed is a 1 wire sensor) about 35.00.