how to install autometer air/ fuel ratio gauge?

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how to install autometer air/ fuel ratio gauge?

Postby smog7 » Tue Feb 26, 2008 10:20 pm

Well I know black goes to a ground and red goes to a 12v positive switch...but how would I go around connecting the purple o2 sensor wire? do I have to dig through the ecu to find the o2 sensor? which one is it?
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Postby Gary » Wed Feb 27, 2008 12:55 pm

From 93 wiring diagram, the "OX" wire is white.
You can access to this wire at the ECU, at the O2 sensor, or at the diagnostic port (easiest, if your wire coming out at the driver side).
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Postby smog7 » Wed Feb 27, 2008 10:45 pm

thanks gary
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Postby AmanGT4 » Tue Jul 21, 2009 11:24 am

I have 2 ox terminals on my diagnostic box labelled ox1 and ox2 which one should I connect the signal wire to.
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Postby AvivB » Wed Jul 22, 2009 7:19 pm

OX1 is the O2 sensor on the down-pipe and OX2 is the O2 sensor after the catalytic-converter in CA spec only.
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Postby AmanGT4 » Thu Jul 23, 2009 7:55 am

AvivB wrote:OX1 is the O2 sensor on the down-pipe and OX2 is the O2 sensor after the catalytic-converter in CA spec only.


Thanks, is the OX1 sensor the first one (1) and OX2 the second one (2) that I labeled in attached pic? Excuse my unfamiliarity I am a newbie.
So should I connect the signal wire to the OX1 in the diagnostic box or to OX2 or does it not matter.
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Postby AvivB » Thu Jul 23, 2009 1:37 pm

What you've marked as "2" in the first O2 sensor...
What you've marked as "1" looks to me like an after-market EGT sensor and not O2 sensor...

Anyhow, OX1 signal in the diag. box is connected to O2 sensor you've marked as "2" and it is the right one to connect the AFR to.

ps. If your car is with CA spec. you should find another O2 sensor at the bottom of the down-pipe.
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Postby AmanGT4 » Fri Jul 24, 2009 6:59 am

Thanks Aviv,

I do have another sensor at the bottom of the down-pipe so that is the OX2 sensor then.

I can finally connect my AFR to OX1 now. Thanks again.
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Postby MWP » Fri Jul 24, 2009 7:03 am

I hope you are not going to be using this gauge for anything other than basic monitoring.
They are useless for tuning.
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Postby AmanGT4 » Fri Jul 24, 2009 12:59 pm

Yeah, I know its only good for a light show but was the given the gauge got it when I bought the car thought I might just hook it up. Thanks
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