Allright, the last thing I need to do for the swap, is wire the o2 sensor on the cat. I need to know where to wire up the 4 wires on the 02 sensor on the cat to the ECU. I have a Haynes manual, but its showing the wire going different places that I dont know and I dont know of the cat o2 is the secondary or primary (im assuming secondary). thanks for help guys!

//Jesse

 

anyone?

 

Year and model car?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by VTECVillain &raquo;</TD></TR><TR><TD CLASS="quote">Year and model car?</TD></TR></TABLE>

durr, sorry

97 LS (b18b) with the 97 LS ECU
its in a 96 civic hatch.

 

Brother,

You should only have to extend you're o2 sensor plug and plug it into the harness on the distributor side of you're car.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ransack &raquo;</TD></TR><TR><TD CLASS="quote">97 LS (b18b) with the 97 LS ECU
its in a 96 civic hatch.</TD></TR></TABLE>

The wiring should be there for both O2 sensors since your car is OBDII. The primary O2 sensor plug will be in the engine harness and the secondary O2 plug will be coming down from the floor near the cat.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by VTECVillain &raquo;</TD></TR><TR><TD CLASS="quote">

The wiring should be there for both O2 sensors since your car is OBDII. The primary O2 sensor plug will be in the engine harness and the secondary O2 plug will be coming down from the floor near the cat.</TD></TR></TABLE>

err hah. ok. I did use a 97 EX harness also, but I will jack that ISH up and see what I can find. I extended one set of o2 wires to the header. well ill look tommorrow. thanks

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ransack &raquo;</TD></TR><TR><TD CLASS="quote">I extended one set of o2 wires to the header.</TD></TR></TABLE>

That would be the primary O2 because it's in the upper part of the stock header in the EX so the plug would need extended to reach the location in an LS header.

 

ok, I read your post over again, and now I get it. there should be another o2 sensor plug coming from the car, and not the harness. I was looking on the harness, opps. thanks. hopefully I can find it.

 

allrighty, I looked and looked, even tore carpet to search, but I couldnt find that o2 sensor coming from the car. I even searched my Haynes and im coming up with nothing. So where is it?! If it there, I wanna use it, I dont wanna wire it up to the ECU itself...


OK, So im thinking why wouldnt there be a o2 sensor in that spot. I remember how where the 2 o2 sensors were on my 96 CX engine. One was at the end of the header and one at the BEGINNING. So im thinking that my car doesnt have that plug in hanging by the cat, cause the car never had an o2 hookup at the cat. So therefore, it wont be in that spot.

So im thinking I have to now wire it up directly. Can anyone point me in the right direction?


Modified by ransack at 12:53 PM 8/18/2003

 

bump for help

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ransack &raquo;</TD></TR><TR><TD CLASS="quote">allrighty, I looked and looked, even tore carpet to search, but I couldnt find that o2 sensor coming from the car. I even searched my Haynes and im coming up with nothing. So where is it?! If it there, I wanna use it, I dont wanna wire it up to the ECU itself...


OK, So im thinking why wouldnt there be a o2 sensor in that spot. I remember how where the 2 o2 sensors were on my 96 CX engine. One was at the end of the header and one at the BEGINNING. So im thinking that my car doesnt have that plug in hanging by the cat, cause the car never had an o2 hookup at the cat. So therefore, it wont be in that spot.

So im thinking I have to now wire it up directly. Can anyone point me in the right direction?


Modified by ransack at 12:53 PM 8/18/2003</TD></TR></TABLE>


well? anyone?

 

the plug should be hanging right behind your intake mani....crawl under the car and look up..that's how I found mine..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 95hbMatt &raquo;</TD></TR><TR><TD CLASS="quote">the plug should be hanging right behind your intake mani....crawl under the car and look up..that's how I found mine.. </TD></TR></TABLE>

I have that one hooked up! Its plugged to the O2 in the header.
thanks tho, unless theres 2 O2 hookups on an civic EX wiring harness..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ransack &raquo;</TD></TR><TR><TD CLASS="quote">

I have that one hooked up! Its plugged to the O2 in the header.
thanks tho, unless theres 2 O2 hookups on an civic EX wiring harness..</TD></TR></TABLE>

well if it's an obd2 wiring harness there should be 2 hookups...one on the front left of the wiring harness and one in the rear under the intake mani...i think

 

allright, I looked and couldnt find a 4wire hookup for the 2nd o2. Maybe im missing it. I see a hookup that does just dangle down towards the o2, but its only a 2 wire plug....thats not it is it?