How To: Air/Fuel Ratio Gauge Install

[evilmonkeyMSP]

I meant tap both power wires for your 2 gauges you are installing into this one 12v line...

alright. and which two both wires would that be?

 

[FL_PR5]

anyone else, i found out i dont have a white wire harness with all the directed wires. i just have straight through wires on it that i guess someone else tapped with other items since they are bandaged with wires and electrical tape.

 

[Brian MP5T]

I don't recall seeing foil.

It is normally a shielded wire...

 

[FL_PR5]

there is no foil or anything. just electrical tape on a few. i'll take a pic and let you see.

 

[FL_PR5]

there you go. i guess where the yellow connectors are and the tape is that is where the harness should be?

 

[Brian MP5T]

Dude, The Foil is on the wire at the ECU, under the feet of the passenger...

 

[LinuxRacr]

It is normally a shielded wire...

This is true. I have seen it now.

 

[Brian MP5T]

Finally! Woot Woot!

 

[FL_PR5]

well damn brian sorry. i'm new to this s***. and i was informed of being able to tap into the ignition wires under the driver side, that is what i was talking about and referring to.

thats what i was going for. plus i dont' know that much about the ECU much less where it's located. that's why i'm asking.

 

[carbonkid]

so can someone definitively state that there is a difference with any A/F Ratio meter if installed at front vs rear O2 sensor? The rear one changes less, correct?

 

[Moonman8]

so can someone definitively state that there is a difference with any A/F Ratio meter if installed at front vs rear O2 sensor? The rear one changes less, correct?

bump for an answer to this question.

 

[jamesk]

red wire should go to the ignition harness. anything else, the airfuel ratio guage would stay on all the time. the gauge will only stay on when you turn the key to on. thats what you want. the wire in the igniton wire is about a 16 gauge wire and the color is black with a white strip. ill try to get pics.

i grounded the black wire to one of the nuts holding down the ecu plate. thats easy because you do not have to make a new hole.

for the purple wire. i took out the ecu and i was trying to find pink with blue stripe. no luck, so i took the black plastic piece off of the ecu harness and it exposes all the wires conected to the grey piece. every wire is numbered and it is very easy to find number 60.

i did not have any butt connectors, so i just twisted the wires together and put electrical tape around. it seems to work fine, it should not be a problem.
if it comes out to be a problem, ill put butt connectors in.

 

[viper00]

hey guys

hey guys on JAN 27 i whent to my friends shop to install my gauges what a mess he did he got all the lights on the gauge to work and my VOLT to work and my AIR/FUEL he hooked it up but i told him it dosent look right ( it has 1 green light and 2 yellows ) and just stays like that dosent move side to side he cut into alll my wires and couldnt get it can anyone help me b/c i'm driveing and it looks stupid thoses lights not moveing i have a mazda 3 touring edition 2.3L thanx alot

 

[jamesk]

check the signal wire. seems like it is getting a 12v source fine but not getting any readings. either that or i think guage is broken.

 

[viper00]

check the signal wire. seems like it is getting a 12v source fine but not getting any readings. either that or i think guage is broken.

hey i tryed all my wires all 4 wires i get 1 green and the 5th wire i get 2 yellows and 1 green could it be that it dosent work on mazda 3 cars

 

[viper00]

hey i tryed all my wires all 4 wires i get 1 green and the 5th wire i get 2 yellows and 1 green could it be that it dosent work on mazda 3 cars

thanx alot jamesk i got it to work my car has 2 O2 and it was on the wrong one

 

[mazdaspeed777]

Subbin, Just got a AF gauge and have never installed any gauges before.

 

[bigcc63]

Where do ya'll suggest the +12v source of ignition to go to............

 

[djarkitek]

got mine working, woot!

 

[Myspeed12]

i installed mine today but the air fuel only has one green light on the rich and i connected it to the first 02 sensor in the engine with the pink and blue wire...whats wrong?