how do i install the af gauge?

[TSiInTX]

i got a a/f guage, what wire do i tap? what color anyway, on my honda it was the blue one, what about this one? its a 95 eagle talon TSi

 

[SpoolinTalon2]

so i was going to install my a/f aguge i followed this how to
http://www.roadraceengineering.com/instructions/afmeterinstallinstructions.htm
i left the power to the gauge with the dimmer switch for now so i can first tap the 02 sensor and see if it works. well it doesnt. i taped it and i taped the one on the bottom of it and nothing. one is white and i dont think its the right one, the gauge wont even show the power on. i tapped the other one on top, which i think is the right one, the gauge is powered on but no readings. i think i might have a dead o2 sensor? any ideas guys? lemme know. thanks.

 

[eclgst95]

You sure you have it tapped into the right O2 hole? And make sure your looking at the diagram maybe you are looking at your plugs upside down?
Also you are starting the car to see if theres an o2 reading cause it doesnt come on with acc just on.

 

[SpoolinTalon2]

i thought about me looking at the plug upside down so i tried both holes that are right next to each other, like i stated in my first post with the results. im going to try it again this weekend and see what happens. but does anyone have any tips or answers? thanks

 

[mnetwork]

I am also having a similar problem.. just installed my boost and a/f ratio gauges, did my boost upgrades (greddy type-s bov, hallman pro rx mbc)... but my a/f ratio gauge never works... somtimes it will randomly go a few bar... but it is very random... usually it doesn't do anything, especially when I accelerate. I tapped into the front o2 sensor (that's where you're supposed to plus I'm running catless with the rear haning in free air). I don't know what is going on. I tapped into the middle of the three white wires on the ecu (pin 76).

 

[SpoolinTalon2]

i feel you man. just waiting for some vets to give some answers to fix this. my guess right now is that i have a dead o2 sensor, but i dont know. anyone willing to help please?

 

[SpoolinTalon2]

anyone with some answers? i need to fix this today. i dont have time during the week hence i go to college. someone please help. thanks.

 

[rksudrick]

Where do you have your power and ground connected too. Are you tapping into the o2 sensor at the ecu or somewhere else???? I have mine at the ecu for o2 and my 12volt sorce is from the ignition harness wired in with everything else. http://www.roadraceengineering.com also has the safc connection listed which shows the blue wire mod which you can tap your a/f to also.... Hope this helps.... Your ignition wire at the ignition harness is a black/white or a blue wire..... Let me know

 

[dave99gst]

are you tapped in at pin 76 ?
Also ground it @ the ECU

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[streetlegends]

anyone with some answers? i need to fix this today. i dont have time during the week hence i go to college. someone please help. thanks.

First off you have to let the car run it's not going to read as soon as you start it because I thought mine wasn't working either untill I let the car run for a while(a few seconds). What I done was instead off taping directly into the ecu I did it between the o2 sensor and the ecu if u took off the center console and look beside the driver seat you will see the a plug with 4 wires running to rear o2 sensor and the colors on the plug are white,red,black,and blackgreen. The white to reading wire,and black to the ground and the red to power and that should work. The sypder n/t has the same set-up as a turbo. If you are still having problems I will post some pics and maybe that will help you guys out.

 

[mnetwork]

are you tapped in at pin 76 ?
Also ground it @ the ECU

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I did tap into pin 76 (middle of the the three white wires), I did not ground at the ecu though. I have power and ground coming from a source that I share with the boost gauge light and one other thing. Does it matter where it is grounded to get readings???

First off you have to let the car run it's not going to read as soon as you start it because I thought mine wasn't working either untill I let the car run for a while(a few seconds). What I done was instead off taping directly into the ecu I did it between the o2 sensor and the ecu if u took off the center console and look beside the driver seat you will see the a plug with 4 wires running to rear o2 sensor and the colors on the plug are white,red,black,and blackgreen. The white to reading wire,and black to the ground and the red to power and that should work. The sypder n/t has the same set-up as a turbo. If you are still having problems I will post some pics and maybe that will help you guys out.

I do let the car run. I've gone for a few rides with it now. It just randomly jumps a few bars every once in a while. Most of the time it's not doing anything at all. Also, I can't use my rear o2 sensor because it is just hanging in free air, I run catless.

 

[streetlegends]

I did tap into pin 76 (middle of the the three white wires), I did not ground at the ecu though. I have power and ground coming from a source that I share with the boost gauge light and one other thing. Does it matter where it is grounded to get readings???




I do let the car run. I've gone for a few rides with it now. It just randomly jumps a few bars every once in a while. Most of the time it's not doing anything at all. Also, I can't use my rear o2 sensor because it is just hanging in free air, I run catless.

Oh ok while then...It's actually think it better if you do ground and get the 12v supply from the ecu. Ok it the wire is just barely connect to the reading will do what you just typed about just make sure you have the wire stripped real good and run it to the 12v source and ground as shown above and test it, if not you might have to replace the o2 sensor because if it's foulded out it will not give you a read out but every now and then. Good luck!

 

[knighteclipse1]

Its not rocket science, dave99gst is correct. I don't say that trying to be an ass, because I am not smart when it comes to things like this, but if I can do it, I am sure you will figure this out. alot of good advice above. Best thing to do is not rush it, take your time and do it right the first time. As said above, tap into pin 76. And remember that when you start your car, you must wait until the temp is up so the A/F gauge reads correctly, it wil jump around for awhile at first. and it levels off at cruising speeds.

 

[mnetwork]

I'm going to redo the wiring and make sure all my connections are strong. I don't see how grounding at the ecu and grounding elswhere will change anything. If that doesn't help I will change my o2 sensor. If I did have a bad o2 sensor, why wouldn't my check engine light turn on. And wouldn't I be having poor performance?

 

[1997hciv]

This should explain it pretty well.
http://www.dsmtuners.com/forums/showthread.php?t=69282
I hope this helps...good luck

 

[SpoolinTalon2]

alright so i didnt get chance to fix the a/f gauge this weekend. sounds like some good adive up being given. you guys mentiond to i just ground to the ecu, should i get the 12v from the ecu as well? also, if everything is installed right and still no readings are coming up, im guessing ita a dead o2 sensor? thanks.

 

[hereitcomes]

alright so i didnt get chance to fix the a/f gauge this weekend. sounds like some good adive up being given. you guys mentiond to i just ground to the ecu, should i get the 12v from the ecu as well? also, if everything is installed right and still no readings are coming up, im guessing ita a dead o2 sensor? thanks.

You can tap the A/F directly into your o2 sensor. Mits o2 sensors have 4 wires in them.
2 white, 1 grey and 1 black. The 2 white wires are for a heater core since the sensor is heat driven. The grey wire is a negative signal reading and the black is the positive signal. I tapped my gauge into the black (positive) wire and it reads fine. This is also a good way to factor out a bad o2 sensor becuase it wont give you a reading. Good luck dude.

 

[mnetwork]

I know it's been a while, but I just wanted to update everyone who had questions on this issue.... I just replaced my o2 sensor and now my a/f gauge is working! It is cylcling all the time like it should and it goes all the way to rich at WOT... before it wasn't doing anything.. I have my connections setup so that the sensor wire taps in at the ecu and the power and ground wires are connected to a source that I use for other things on the car (gauge power and ground doesn't need to be tapped into the ecu)...

 

[eclgst95]

Great!
Thanks for the update!

 

[SpoolinTalon2]

mnetwork how much was it for a new o2 sensor? Was it hard to change? I think this is what I am going to have to do as well, but I am still going to try what the previous posts said, to make sure i taped into pin 76 and maybe gorund at the ecu, but I also thought you didn't need to ground there becuase right now I have the gauge getting power from the dimmer switch and it gets power.

 

[mnetwork]

Mine was $75 on eBay, but I got the wrong one (the one that they tell you to get for a talon is the WRONG one, I think you're supposed to get the one for the eclipse) since I bought the wrong one I had to cut the connector off and wire it as if it was a universal sensor. They range from $70 - $100.. Mine was a PROJECT to take out. Nothing I could do could get it out so I had my friend help me and we brought it to his job, put it on a lift.. he tried everything also, he finally had to use a torch and a gun to get it off... after that it's very easy... I also had to remove the bottom heat shield so that i could hit it with the torch. Hopefully yours isn't a project like mine was. Also, you do not have to ground at the ecu. I grounded my meter at a screw under the dash and it works fine...

 

[SpoolinTalon2]

Alright, but then again everything is a project the first time, . Which one is the ground on the gauge? I dont know what colors are on the wires, but I will let you know. Do you know the price of a brand new o2 sensor? And you said to get the Eclipse one? Thanks.

 

[mnetwork]

The ground wire on the gauge should be black, pretty universal that way. As for the sensor model... they will probably try to sell you one that ends in the numbers 39... that one has a round connector and does not fit the talon. I think the talon and the eclipse both have the same connector, a square connector. Ask to see the one that would be for the eclipse and make sure the connector is square... O2 sensors range from 70 to 100 dollars from what I've seen.. That's the standard price.. not toooo bad.

 

[SpoolinTalon2]

So only one of the wires goes to the dimmer switch, the power one, I thought both hooked up to it. I tried it with both wires hooked up to it and it works, I also have my boost gauge like that, does only the power wire connect to the dimmer switch and the ground, I'm guessing black wire as well, hook up to a screw on the steel body?

 

[mnetwork]

If you hooked the gauges up with both wires too the dimmer switch and it works fine then don't worry about it. I didn't use my dimmer switch, I just have it constantly on with the ignition... Just make sure you get the sensor wire in the right spot. A/F gauge might not be so useful, but I love it because it told me I had to change my o2 sensor... Now I'm getting my great gas mileage again...

 

[SpoolinTalon2]

Interesting, I didn't know that your o2 sensor could mess with yoru gas mileage, can you elaborate on this? I am hoping to finally get to correcting the A/F Gauge install on my car but I haven't had time because of school but I have finals this week and it should be getting done. Thanks again guys.