does anyone know how to wire up the 5 wire 02 into the factory 4 wire 02 setup i am having troubles finding out how to do this. please help i am getting ****ty *** gas mileage. like 200 miles to a tank. the only thing done to the motor is a y8 intake manifold with a ls throttle body. but pleas give me a pin out of the 5 wire 02 wiring.....please

come on people i know someone knows how to wire up a 5-wire 02 into a dx with the 4-wire 02. please help me

You need the factory service manual at the very minimum and maybe as far as the electrical wiring diagram. If you're serious about working on this car, just pony up the $50 or $100 for BOTH books and you'll be good to go. The books are very cheap for these cars especially if you get them used because these cars are so plentiful.

Helm Incorporated sells these:
http://www.helminc.com/helm/search_s...&class%5F2=AHM


You will not regret purchasing these unless your car gets totaled or stolen..lol

Owning the books is always an asset. Here's a list of the books I have for my vehicles:

The Big White Hooptie:
All 1977-1982 Buick factory parts catalogs
1981 Buick Service Manual
1981 Fisher Body manual

Rusty:
1986 Chevy truck service manual
1986 Chevy truck electrical manual


I've never done any service on my 98 K1500 that has required any manuals.

__________________

i have a large chiltons honda book but doesnt help much. ive been studying the darn thing for 3 weeks now. it shows 6 or 7 wires and the 02 only has 5. im using my stock dx wire harness. im a good electrician and this has got me stumped. but i think i found something last night to help run the wires to the right pins on the ecu. hopefully it works. Yes trust me i never go anywhere without my chiltons manual.

There are 5 wires on the O2 and 7 wires in the harness it connects to because there is a calibration resistor sitting inside the connector of the O2. The ECU uses this resistor to calibrate the readings it gets from the O2, that's why there's 7 wires on the car-side harness and only 5 wires on the O2-side.

There may be a How-to on the other site.

__________________

Honda Civic VX Info/Links
Remember to use good Webiquette!

ok so i need the other half of the plug. but what pins does the other 5 wires goto

LAF Troubleshooting guide You can find a pinout there.

__________________

Honda Civic VX Info/Links
Remember to use good Webiquette!

dude thats the most helpful thing. thanks for finding it i've been searching every where for something like that. now all i need is the female side of the plug so it has the resistor in it. then i can run the wires fresh to the ecu. right now im running a p72 ecu in it for the 4 wire 02. it runs strong for 92hp. only has a y8 intake and a ls throtle body. everything else is stock. vtec is nice kicking in at 4500 then it pulls good til 7100. but i rather have the fuel eco right now

You're welcome.
The resistor is inside the O2 side plug, not the car side. And I have a spare one I can sell to you if you want. PM me if you're interested.

__________________

Honda Civic VX Info/Links
Remember to use good Webiquette!

i have the o2 sensor. i just went to my parts shed at my parents and cut the plug from the distributer harness since its the same. now i just have to read and read that diagram to get it right.

Ok cool, I was just wondering since I have a plug to connect to to the O2 that has about 6 or so feet of wire on it already as well as it's shielded (the signal wires need to be shielded to keep out interference).

__________________

Honda Civic VX Info/Links
Remember to use good Webiquette!

ok so i matched up the wires to my book and one of them say to plug into the vtec spot on d14. and two of the other wires says to plug in where some other sensors are. i think im just gonna leave the p72 ecu in and fixed the revving up and down at idle. im worried that it might screw up something if i wire it up wrong. and i dont have the money to fix anything.

The ECU pinouts on the P07 are different than other Honda ECUs.
That PDF I linked you to is right out of the Factory Service Manual so the wiring is correct in it.

Here is the picture from the back of the book:
L1H1 Pinout you'll want to use the "Except California" side.

__________________

Honda Civic VX Info/Links
Remember to use good Webiquette!

thats a better picture. Ok im not disagreeing with you but its saying the white wire goes to d14 witch is where the vtec wire is. do i run them together that just dont make sense. so tell me this the way i learned to read the pins is left to right on top and left to right on bottom being 1-11 is on top and 12-22 is on bottom. i've done alot of ecu re-wire jobs like dpfi to mpfi, and lots of vtec jobs, and a few other things. but never a o2 hook-up. so i just want to get this right.

This is a good picture of how to read the pinout on the ECU.

__________________

Honda Civic VX Info/Links
Remember to use good Webiquette!

ok i will go by that then i thought they went the other way. but i gotta wait til wed. next week to do it my dad is gonna bring me home a 7 wire shielded cable. so it will be done right

ok cool i will go buy that. its what my book says but some how i learned they read from left to right. but any way im gonna go by how u say since you've done this before. i gotta wait til wed. next week when my dad can bring me home a shielded 7 wire cable. which will make it nice and easy to hook up and look good. thanks for all your help bro. sorry if i bugged u to much but i just dont want to fry anything.