March 31, 201313 yr You really need a wide band o2 sensor for an a/f gauge, the stock one won't give a very useful reading. Regardless, it should be pretty easy to figure out which wire is which. One will be +12v, one will be ground, the third is the signal wire you want.
March 31, 201313 yr It's the odd color. Two will be the same, those are for the heater. The signal wire will be the different color. Agree with 987687 though, you need an A/F ratio (wideband) sensor to get an accurate reading.
March 31, 201313 yr I don't know if the ECU will like the signal out of a wideband, it's tuned to work with the sensor it was designed for... I guess the best way would be to add a bung for the wideband sensor, or maybe there's one that will work with the ECU. What are you trying to accomplish here? I don't really see the reason in installing a a/f on a stock 2.2.
March 31, 201313 yr Author I just like being able to know what my engine is doing. I have also installed a oil pressure gauge and vacuum gauge
April 1, 201313 yr You'll have to install a standalone wideband sensor for the gage. The ECU will not work with that type of sensor in place of the standard oxygen sensor. The ECU also may not like it if you split the signal wire to the OE sensor. I think either way you'll be better off with a standalone sensor for the AFR gage.
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