A/F guage
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TECH Apprentice
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Joined: Oct 2004
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From: Paved road in OK
A/F guage Which # pin would I connect to for installing an A/F guage on my 98 formula? I would rather connect it at the PCM and not down by the o2 sensor. Any info would help, thanks.
I have never heard of putting the wire into the a pin. You must tap into the oxygen sensor wire, but you can do this up top, close to the PCM. All you need to do is follow the violet wire up from the front passenger side oxy sensor and tap into it by the PCM.
I have one and they are mostly an idiot guage. I guess thet makes me an idiot. lol 
I bought mine to use when I run Nitrous. I won't spray unless it is pegged green. I have never seen it move outside of pegged when I run, but the guage is good to watch when using nitous. Other than that though I wouldn't spend the money again IMHO.
I bought mine to use when I run Nitrous. I won't spray unless it is pegged green. I have never seen it move outside of pegged when I run, but the guage is good to watch when using nitous. Other than that though I wouldn't spend the money again IMHO.
