Ok, I have spent much time researching on the

1st gen SIR-I JDM B16 obd0

This is the swap I currently have in my 90 Integra.

I am still obd0. And plan on staying obd0

I have a PR3 ecu,

I have Vtec oil pressure and solenoid wired.

Its now time to have the second o2 sensor that the 1st gen JDM b16A obd0 needs.

----

You can not tap into the o2 sensor and run the second off the first, in an attempt to trick the ecu into thinking there are two o2 sensors.

The reason for this is each o2 sensor runs Two runners, if this is done two will either run very lean or very rich.

So, I am having the Second o2 bung welded in to my 4-2-1 Header.

Now my question is, Which o2 sensor goes where into the ECU.

I understand the stock wire for the o2 is ECU PIN Co8
And the new one is C16.

But which pin controls with two runners?


And no don't tell me to convert to obd1 unless your going to give me the stuff for free. So if your going to say that STFU and GTFO.

Thanks!!

 

quoated from hondata

Early VTEC engines use two oxygen sensors arranged to read one cylinder pair per oxygen sensor. The mixture for each cylinder pair is tuned separately. It is important not to wire the sensors around the wrong way, otherwise one cylinder pair will run lean, and the other pair rich. It is also important not to wire one oxygen sensor into both sensor inputs, otherwise the engine will run either very lean or very rich.

 

Here you can see where the second o2 sensor should be wired.

However i dont know which monitor which runners..

 

FOUND MY ANSWER

Thanks to

91VTEC

On G2IC.com

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 91VTEC &raquo;</TD></TR><TR><TD CLASS="quote">pin C8 is for the number 2 o2 sensor, cyl 2+3... pin C16 is for sensor 1 and monitors cyl 1+4.... and it does make a difference if they arent wired correctly, made light throttle bubbly and stutter and also threw a CEL... hope this helps</TD></TR></TABLE>

 

can i weld a damn bung on my 4-1 header at all ? i dont want 2 pai to run lean and other 2 run rich .... seems like this only works on 4-2-1 header the best but now 4-1 .. any ideas?

 

 

yeah i got the b16 stock header and i also have the 4-1 header came in mail last night. i need to weld a bung on. will it alright if i weld 2 o2 bung on runner 1 and 2 ?