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Underbody braces, turbos and more!

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PostPosted: Sun Sep 17, 2017 2:56 am 
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Location: Vancouver, BC, Canada
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. :lol:

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.

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PostPosted: Sun Sep 17, 2017 4:35 am 
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Joined: Tue Mar 16, 2004 6:23 am
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Location: Washington, DC
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.

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PostPosted: Sun Sep 17, 2017 2:05 pm 
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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 :huh:


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

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PostPosted: Sun Sep 17, 2017 4:10 pm 
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Location: Ontario, Canada
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

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PostPosted: Sun Sep 17, 2017 4:17 pm 
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Please let me know.... Thanks.

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PostPosted: Sun Sep 17, 2017 7:10 pm 
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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.

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PostPosted: Sun Sep 17, 2017 7:37 pm 
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Which model is that and where do you buy from... :twisted:

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