Hey guys i did a search on this and i can't find out which wires i have to use from the ECU to connect an A/F Ratio Gauge on my car, i have a feeling i am running rich and i have been wanting one of these anyways any help is greatly appreciated

 

What makes you think you are running rich?

What mods do you have?

 

you need to buy a wideband setup with its own o2 sensor. That will need to be welded into the s pipe.

 

i cant tap into the o2 sensor wire from the ecu?? i just did that to a friends integra. I think im running rich because my car sputters out once in a while and i have a feeling it has something to do with the custom intake i made to keep until i bought my turbo kit

 

its ok on an integra, but not a tC. We have narrowband sensors so they will not read correctly. You have to use a wideband setup. Or get one of those tool thingys that read from obdII.

 

^ Yes.... you will get nothing from trying to wire up to your stock guage, as well as getting crap results from a narrowband o2...

I'd be significantly suprised if you were running reach... the stock ECU does a pretty good job in closed loop of keeping you at 14.7

 

its just that ever since i did my intake sometimes when im flooring it my car jumps forward and i know its from throttle i can hear the rpms go up to i still think im running rich

 

any soot on the rear bumper?

 

my new exhaust tip comes out like 1" past my bumper, but i saw smoke yesterday when i revved up

 

...

 

any one know how to wire it up even if it wont be accurate i still want to hook it up on my car

 

the primary O2 is a wide band sensor (air fuel ratio sensor) and the secondary is a narrow band sensor (oxygen sensor). Wide band sensor is on the exhaust manifold and narrow band sensor is on the s-pipe.

You can hook up an a/f gauge by tapping into the Oxygen sensor signal line at the ecu. I believe Dezod started up a thread with an ECU pinout for the tC. With an a/f gauge, all you see is a constant sweep from rich to lean, lean to rich.

if you understand what this guy said then do as he says. a wide band gauge setup with its own sensor has the ability to give you precise reading of your vehicle's air fuel ratio.

 

You can hook up to what ever you want, but YOU WILL NOT GET YOUR AF READING. You will get numbers or the needle moving on the gauge, but they will mean nothing. This has been tried again and again and EVERYONE has failed.

Sounds like the original poster just wants a guage to look good. Not a gauge to make sure he is running safe.

A quick search:
https://www.scionlife.com/forums/vie...ge+narrow+band

https://www.scionlife.com/forums/vie...ge+narrow+band

https://www.scionlife.com/forums/vie...ge+narrow+band

There are tons more with the same style answer I gave. but its your car, and if its for looks, you can just tap whereveer you please.

 

NOt worth your time if your planning on going turbo in the future. Just sell your narrow band and get a wideband.

 

Yeah im thinking of that, no i dont just want it for looks i wanted to see what it would read, but if its not gonna work then screw it, ill just get either a aide band or the obdII scanner hook up, thanks for the help guys, and i still think im running rich so i have to buy the wideband