air/fuel gauge install?? - Subaru WRX Forum
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#1 Old 01-10-2009, 09:45 PM
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air/fuel gauge install??

i have a prosport air fuel gauge wired the green wire on the gauge (which is the one that is the one that hooks to the 02 sensor)to the white wire on the front 02 sensor and the needle on the gauge just gos right to rich and stays there when i start the car. i tested the reading on the white wire and it was 3.5-3.6 volts at idle and changed whe i hit the gas so it should be the right one and i got the same reading right to the gauge so eather it is the gauge or i did somthing wrong. please help. and i know this gauge isn't that acurate so don't rost me.

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#2 Old 01-10-2009, 10:01 PM
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You have to have a wideband o2 sensor and gauge to get accurate readings.Sell that gauge!

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#3 Old 01-10-2009, 11:26 PM
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I had mine hooked to the rear o2. but it is usless if you dont have a wideband sensor. Innovative makes one that is supposed to work with the guage you have.

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#4 Old 01-11-2009, 10:28 AM
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i know it's not accurate and i ###### will get a wide band to hook to it at some point but right now i want to hook it up as is. would there be a diference in hooking it to the front or rear? i would think the front would be better. what is Innovatives site?

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#5 Old 01-11-2009, 10:40 AM
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i had mine hooked to the front and it was always pegged at blinking 20.0.
I hooked it to the rear one and it would bounce around like crazy.
you need the lc-1, MTS Modular Tuning System

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#6 Old 01-11-2009, 02:23 PM
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yeah i think the front sensor must put out too much power.

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#7 Old 01-17-2009, 09:13 AM
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i have the gauge hooked to the rear sensor now and now it stays at all the way lean and dosn't move. the reading i got from the sensor is a half a volt. it is the white wire that i should hook it to right?

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#8 Old 01-17-2009, 09:29 AM
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I used a wire off the ecu
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#9 Old 01-20-2009, 10:10 PM
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that shouldn't make a dif. it's the same voltage. and from what that says the front 02 sensor is the air fuel so i should be using the front sensor. but that is too high of voltage from what i am understanding.

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#10 Old 01-21-2009, 12:19 PM
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The rear o2 is the idle sensor if I'm not mistaken.... Might be better back there... No?

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#11 Old 01-22-2009, 09:25 AM
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it really doesn't matter which one you use, it isn't going to give you an accurate reading anyway until you get a wide band O2

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#12 Old 01-23-2009, 12:56 AM
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Quote:
Originally Posted by nagyhead View Post
it really doesn't matter which one you use, it isn't going to give you an accurate reading anyway until you get a wide band O2
i know that but as i said before i would like to hook up what i have and have it work at least as well as it could but i can't get it to work with eather the front or the rear so i'm not sure what to do now. the fron i think gives too much voltage and the rear not enough so unless i'm missing some thing it won't work at all.

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#13 Old 01-23-2009, 09:21 AM
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that is what i am telling you. it will stay pegged at 20.0 all the time, until you get a wideband.

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#14 Old 01-23-2009, 08:55 PM
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AHHHH OK. i'm sorry i did't understand what you were saying. i thought you ment it it would work but just not give a dead on reading not stay peged and not work at all.

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#15 Old 01-23-2009, 10:50 PM
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Where is the best place to install the wideband sensor?

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