PaImportTuner

I read up on many topics in the archive but can't fully understand the process.. to start off I have a Spoon chipped PR3 ECU.

the JDM 4-1 I have has only (1) o2 sensor bung on the collector. some people say 1 is good enough. others say splice both o2 wires from ECU into 1 o2 sensor. some say to just weld another bung.

just incase i do this, I want to know where the hell i make the 2nd o2 bung location at if it's 4-1 and the cylinders aren't paired like a 4-2-1. at the collector is 1 already.

Question 1:
Who is running OBD0 PR3 and only 1 o2 sensor on there 4-1 (how did you do it and what sensor did you use).
Question 2:
For those using both sensors where did you mount the 2nd sensor on the 4-1.


Modified by PaImportTuner at 3:52 AM 1/6/2005

crexer

sorry bro I had the exact same topic last night and nobody would talk to me....
https://honda-tech.com/zerothread?id=1104469

doublethink

the obd0 sensors need to be that close, and they each read different runners. 1/3 and 2/4 which the ecu sees in a pattern, like 1 2 1 2 1 2 1 2

its not a good idea to mess with what the ecu is expecting. but on a 4 to 1, it would make sense to use cylinders 1 and 2 for your locations.

perhaps by modding the ecu you could change this o2 configuration..... or go with a zdyne

krazie1

u can just get a chip to run one o2 sensor instead I did that until I changed over to obd1

I also had ur set up expect I have a Spoon JDM 4-1 header b16a head 1st gen

good luck let me know if u still got questions

PaImportTuner

Does anyone know if the Spoon program in general is for 1 o2 sensor setup? 4500 vtec,8500rev, governor taken off. thats all I noticed really. right now i'm still runing 2 sensors.

If no1 can answer this, what i'll do first is try it with 1 o2 then if it runs shitty. i'll get the o2 bung on the collector sealed and then relocate it to 1st cyl other to the 2nd

PaImportTuner

Also another question where should i place the o2 sensors.. how far in length from exhaust ports. Thank you for ya help in advance.

virginia_dude

just weld 2 O2 bungs on the header...one on the far left tube 6 inches off the head, and one more on the second one over.....

anything that has you running 1 O2 sensor without doing a full ODB1 conversion is going to work like hell.

thats what I did, I have no issues and have nothing half a$$ cobbled up.

Nerologic

the PR3 sppon, does read both o2's unlike the mugen that doesnt really care about what teh o2 says

i ran into this problem, and since the o2 bung is at the collector, i just ran both of them off of it because that o2 its getting the exhaust from all 4 cyls...

i wouldnt have spliced it if it was on one of the runners, but since it was on teh collector i did it and worked fine

PaImportTuner

**** haha..

so you mean 2 o2 sensors at the collector?? OR you spliced all the wires to 1 o2 sensor. If thats the case then.. did you use the stock primary o2 or did you use a 4 wires or wideband.

HondaCivicSiR1

yo i have a b16a1 in my ef9 and i have dc 4-1 header i wired my both of my o2 sensors as one and it works fine

PaImportTuner

yo know your not too far from me.. oh hold up you are Jack's brother haha wassup. I left a note on your bros car for this site at his job, when i was there eating with my wife. i live around the strip club on 422. foxy tails or some ****. I called your brother the other day to meet up but he was with his girl.

thats ******* cool. makes me feel better ima going to dyno after to see how my a/f is. i just didnt want to put something on or hack **** up and have down time on car.

Nerologic

yeah i spiced into the single wire o2 and ran both o2's from that, it worked fine and was the only way i made it work.

i heard like grounding the o2 stories, and running the secondary o2 and just leaving it like somewhere in the engine bay, that stuff all worked, but the car didnt run as good...

heres some good info

http://www.hondata.com/techo2problem.html

Nerologic

on a side note, i ended up going OBD1, to run hondata, if you are going for max power OBD1 is the best way to go with ease..

87sivtec

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by virginia_dude &raquo;</TD></TR><TR><TD CLASS="quote">just weld 2 O2 bungs on the header...one on the far left tube 6 inches off the head, and one more on the second one over.....

anything that has you running 1 O2 sensor without doing a full ODB1 conversion is going to work like hell.

thats what I did, I have no issues and have nothing half a$$ cobbled up.</TD></TR></TABLE>


Exactly!

flatblackracing

try to unplug the secondary O2 sensor and see if a check engine light comes on, drive it for a while to make sure. if not then the spoon program is most likely not using both sensors. I run one o2 with a chipped pr3 with no problems runs perfect...

87sivtec

FYI. PR3/PW0 ecu's have both O2 sensors written into the code.
All the software such as BRE/Turboedit does not alter the code, just the parameters. You can only delete the use of both of them or use both of them. You can't tell a PR3 to use just one and run properly. A PM6 is designed to run with just one.

PaImportTuner

well my Spoon program rom got rid of the 2ndary o2. and i'm running 1 o2 right now.

but on a 4-1 you can splice 1st o2 and 2ndo2 wires together and it works perfectly fine.

HondaCivicSiR1

yea your welcome

PaImportTuner

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HondaCivicSiR1 &raquo;</TD></TR><TR><TD CLASS="quote">yea your welcome </TD></TR></TABLE>

no prob jacks bro. lol

87sivtec

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PaImportTuner &raquo;</TD></TR><TR><TD CLASS="quote">well my Spoon program rom got rid of the 2ndary o2. and i'm running 1 o2 right now.

but on a 4-1 you can splice 1st o2 and 2ndo2 wires together and it works perfectly fine.</TD></TR></TABLE>

Ummm... OK.
try doing it properly and you may find the driveability that you didn't know you were missing.

Edit: If it is running ok, then why did you ask the original question? Something must have made you wonder if it was done right?