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Since a lot of people have been installing Air/ Fuel ratio gauges, I thought I'd share how to wire it to the correct wire at the ECU. I find this way will give you more slack so you can place your gauge anywhere you want. It's also a lot easier to tap into a wire without having to push it through the firewall.It's really easy once you find out which wire you need. I had to tap the sensor wire at the O2 sensor then run the wire around and inside to the ECU. From there Iused a multimeter and hooked one up to the O2 sensor and the other I used to poke each plug until I got a tone.So Here it is. Plug #3 (from left to right), Black wire in the upper left quadrant. I know it started out blue with a white stripe, but it's the only wire that gave me a tone and it seems to be working right.

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If your not going to use any tap in clips then the best way to wire it is to take about 3/4" of insulation off the wire. Then take a needle and poke it through the wire bundle and make a hole big enough for the new wire to go through. Tread the new wire through the hole and twist it wround good. Then make a half loop and tape really tight.Here's the back view. The locking clip is on the bottem.

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