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Discussion Starter · #1 ·
I think I have my A/F Ratio gauge hooked up correctly and it only registers at the most rich point on the gauge no mater what I do. The gauge came with three wires in the back; Black (which I have grounded, RED (which I have connected to a 12 volt source), and purple (which I have connected to a GREEN wire with a BLUE stripe that connects to the O2 sensor.

I have 2 O2 sensors that I have tried and I still get the same reading. I also tried the other two wires connecter to the O2 sensor and got the exact opposite, all the way lean.



Just for the record I have a '91 Pony with a '02 SPI under the hood.

Thanks for the help, maybe someone could make a HOW-TO. :wink:
 

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i connected my af guage in my pony right to the computer harness under the hood. ill check tomorrow what wire/pin i connected to.
 

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You do realize that you have to wait for the O2 sensor to get to operating temp before you can get anything even close to accurate...


I hope you got a big white one with really gaudy blue lights that you can cram onto a gauge pod that doesn't fit correctly on your A pillar!
 

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WTF are you talking about siragan?

he is right about op. temp though.. but on that engine it only takes about 10-15 seconds, so a moot point not worth regarding.
 

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dude sirgan you are a total jerk. someone does a motor swap has some problems and your like "oh your stupid, you ricer" but sugar coat it. not like you can hide it.

NEUMAN
 

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ur suposed to hook it to the black wiere that come off the sensor. i beleve you got it hooked up right... the grey one is grounded, and the white ones are the heaters.

oh btw.. mine reads reguardless of how hot or cold it is. dont be a fucking asshole.

it seams as if the moderators on this forum tend to get the ass hold syndrome when they get the power.
 

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siragan said:
You do realize that you have to wait for the O2 sensor to get to operating temp before you can get anything even close to accurate...

I hope you got a big white one with really gaudy blue lights that you can cram onto a gauge pod that doesn't fit correctly on your A pillar!
Wow, your an ass. How did you become a mod?
 

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The A/F gauge should read all the way lean when it's first started-cold. Than with in about 15-30 seconds it will slowly clime. After about a minuet it should bounce around quickly like narrow bands are good for.

If your getting a reading as soon as the car is started than you have a O2 sesnor with some kind of super powers. Or it's wired wrong.
 

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Discussion Starter · #11 ·
It moved for the first time today!!! I didn't see where it started(I was busy pulling out of a tight paking spot with manual steering) but 3 minutes down the rode I looke over and it was at rich and when I let off of the throttle it went to almost the lowest normal point and then when I gave it gas it went back to FULL rich. Also at idle after it was warm it was at full RICH.
 

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Jeffescortlx said:
The A/F gauge should read all the way lean when it's first started-cold. Than with in about 15-30 seconds it will slowly clime. After about a minuet it should bounce around quickly like narrow bands are good for.

If your getting a reading as soon as the car is started than you have a O2 sesnor with some kind of super powers. Or it's wired wrong.
Yeah that's what mine does. I have it hooked up to the signal wire on the PCM - I just traced it from the O2 sensore to the PCM so I wouldn't have to run ANOTHER wire into the engine bay! :lol:
 

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Tracer-X said:
It moved for the first time today!!! I didn't see where it started(I was busy pulling out of a tight paking spot with manual steering) but 3 minutes down the rode I looke over and it was at rich and when I let off of the throttle it went to almost the lowest normal point and then when I gave it gas it went back to FULL rich. Also at idle after it was warm it was at full RICH.
Yeah that sounds right. @ WOT it should be all the way rich, or about 1 bar from the top, when your slowing down in gear it will dive all the way down and while cruzing it will bounce around in the middle, that's just normal closed loop staying at the 14.7 ratio.
If it moves slowly, then you need a new O2 sesnor.
 

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I think we should all remember that one of his earlier posts with codes showed that he needed a new O2 sensor and was having problems with some rich codes and/or MAF problems. I think the picture here is a little cloudy because he has multiple problems with parts from three engines involved. I wouldn't worry about your A/F guage problem until you clear up some of the other gremlins first; I suspect the A/F guage works fine.
 

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Discussion Starter · #18 ·
Jeffescortlx said:
If it moves slowly, then you need a new O2 sesnor.
I just bought one tonight. Schucks has a thing going right now where you buy 4 Bosch spark plugs and a Bosch O2 sensor and you get a prepaid gas card(after mail-in-rebate). So I bought a set of plugs for my wife's '97 Escort and an O2 sensor for the Pony.
 

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Discussion Starter · #20 ·
$41 Bosch O2 sensor installed and the car runs better and the A/F Gauge works properly now!!! Thanks for everyones help.
 
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