TeamSwift

I am not 101% sure how to convert 1 wired to 4 wired O2s properly... Since 1 wired O2s is not accurate for reading AFR gauge therefore I don't want to mount both O2s of 1 wired (for ECU) and 4 wired (for AFR gauge) on the exhaust manifold.

So far as I understood.

buy one of any 4 wired oxygen 2 sensor that can mount on the exhaust... like this cheapest 28cdn at http://www.rockauto.com/en/moreinfo.php ... 78&jsn=239

connected O2s signal into 02s pin of the ECU and AFR gauge.
connected O2s ground onto the negative battery.

Ignore heated wires... since MK2/3 ECU except MK3 JDM ECU doesn't have heated O2s pin.... but is it possible to use the relay to heat O2s faster?


So am I missing or something?

edit: I totally forget about NB is between 0.1v to 0.9v meanwhile WB is 1v-4v therefore... so this is not possible to convert to 4 wired from 1 wired O2s?

Thanks.

_________________
sorry bout my bad english

That edit at the end sounds as if you've figured this out, but just in case you haven't: neither a one wire or four wire OEM O2 sensor will properly run an AFR gauge. What you need is a wideband O2 sensor. Some more advanced AFR gauges provide a narrowband output so that you can just install the wideband, wire it to your gauge, and then run the narrowband output back to the original wiring to feed the ECM.

_________________
91 Pontiac Firefly Turbo
10 Suzuki Kizashi


Alcohol, Tobacco, and Firearms
Should be the name of a convenience store, not a government agency

That cool if aftermarket AFR can output as NB for ECU... I am pretty sure sure that 4 wired 02s is wideband too.... my bad


I meant look at those graph... NB O2s is not doing well when the engine is rich.

http://www.iwsti.com/forums/ecu-tuning- ... -data.html

and bonus that AEM's wideband O2s and AFR gauge seems the best product for accuracy and response rate... no?

http://www.fordmuscle.com/archives/2007 ... /index.php

_________________
sorry bout my bad english

I think this is the one I have, I'll have to look in the shop to verify. It has output for single wire O2 as well and I think I paid $160 for it on ebay

EDIT: Forgot to post link http://www.innovatemotorsports.com/products/MTXL.php

_________________
Contact 3tech: [email protected]

Please let me know.... Thanks.

_________________
sorry bout my bad english

I have the aem one, it works well and has the output for ECM. I believe it was the best bang for the buck when I was looking for one.

_________________
1995 Swift w/16V 4.39s, 3tech cam, Esteem t-body, Header, needs more.
1995 Gt Mustang "Boss Shinoda" package.
1999 F150 4x4 Supercharged
1967 Mustang 428 auto, never ending expensive project
1993 Civic si h22a, fell in my lap, couldn't resist!

Which model is that and where do you buy from...

_________________
sorry bout my bad english