AFR installation Info needed

antman · Post by **antman** » Tue Jul 01, 2008 7:48 am

Anyone know how to wire or have a wiring diagram for a lambda sensor to a Air Fuel Ratio Gauge (AFR). The sensor i have is a 4 wire unit. Any info will be appreciated.

Gary57 · Post by **Gary57** » Tue Jul 01, 2008 8:02 am

What sensor and what gauge is it??

Pinkfluffybunnys · Post by **Pinkfluffybunnys** » Tue Jul 01, 2008 4:28 pm

Is it one of those guess o meters for autoguage?

antman · Post by **antman** » Wed Jul 02, 2008 6:28 am

I have not bought a guage yet but have the sensor, just wanted to know the wiring circuit. What guage do you recommend, I seen some that flicker so fast it looks like a christmas tree.

Pinkfluffybunnys · Post by **Pinkfluffybunnys** » Thu Jul 03, 2008 10:14 am

The gauge to my understanding will only take the 5 volt out-put from the sensor most of the other wires are used for sensor warm-up but you will need to fid power to the sensor and give that 12 volt (ACC) never leave the sensor powered and the engine not running.

But mostly those AFR are guess o meter they will only tell you accurately where 14.7 AFR is then just swing rapidly into rich on boost and maybe lean of it
but there is a guy selling on for cheap on the speed and sound fourm

Pinkfluffybunnys · Post by **Pinkfluffybunnys** » Thu Jul 03, 2008 2:47 pm

If your car's sensor is the 3-wire (or 4-wire) type, you will need to locate the signal output wire. The extra wires found in this type of sensor are to power an internal heater, which brings the sensor up to temperature more quickly than occurs solely by heat transfer from the exhaust gas. With the car running and up to operating temp, one wire will have +12 volts on it, another 0 volts (the earth), and the final wire 0.4-0.6 volts. It is the latter that is the EGO sensor output, which must be connected to the '02INPUT' on the Mixture Meter.

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antman · Post by **antman** » Fri Jul 04, 2008 7:04 am

Thanks for the feed back.