ok i searched and maybe i read the info but just didnt understand it. i need to know the ecu pins for the 4 wire o2 sensor. my wire colors dont match, so a pic or diagram of the o2 plug is needed too.
basically just tell me where to put each specific wire (ecu location to diagram of o2 plug)
thanks

 

also, i have an hf with one o2 sensor (one wire) and my conversion harness has four extra wires for the o2. two of the wires on the harness say o2 ground. so do i ground these or does that mean that they are meant to be used as grounds for the sensor?!

 

seriously. i need help to get this car to pass emissions cause my 3rd gen lude broke.

 

its cause im fat, isnt it?

 

found this link, first hit on google search:

http://www.hybridautomotive.com/tech/o2/

 

ok but my conversion harness has four wires. and my o2 sensor has 4 wires. my origional o2 sensor has one wire. i just dont know if my origional wire is hooked up to anything anymore or if it has been replaced also, im assuming that the power wires from the ecu can be interchanged.
but my big question is the grounds. can the o2 sensor be grounded to the ecu?

 

You need a 4 wire O2, follow diagram on the right..

 

i know i ask alot of questions... but my o2 has two black wires, a grey one and a white one... which is why i needed the plug location diagram. and what does switched power source mean? i have to put a switch somewhere to make the o2 sensor work?

ugh. please be awesome and spell it out like im a complete idiot. i suck at wiring. thanks for the responses guys

 

switched power source = wire that only has power when the key is in the on position

I don't have the pinouts hand and i'm lazy but http://www.pgmfi.org has them in the wiki

 

teo black are for the heater inside the 02. u dont use the stock 1 wire plug at all.

 

Wait a min

I thought it went in this order:

Black - Common Ground
other black - A6 (Controled heated circuit)
Grey - Switched power source (A25 or yel/blk wire from another sensor)
White - D14

http://technet.ff-squad.com/wiring.obd1.htm

So the O2 always has power going to it but the heated circuit is completed when it's grounded out by the ECU.

Is that not right?

 

so how do i tell the difference between the two black wires? i need a description or diagram of the plug for the o2... like which wire is which on the o2

 

It doesnt matter, both blacks are the same.

Theres a picture above.