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Discussion Starter #1
i have one question, i want to know what color wire on the o2 sensor to hook up a air fuel gauge?
 

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Discussion Starter #3
there is a 1white, 2 black, and 1 blue wire. i guess you are talking about the blue wire?
 

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Discussion Starter #6
yea i just tried all 4 wires on the primary o2 and all 4 read rich. but my car doesn't smell rich or lean.
 
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