02 sensor?

[RickGT]

nah there 2 black 2 grey, that must be off a blacktop or something

[slighty_sykotic]

My silvertop o2 sensor has two grey and two black aswell.

Now I have to find out which is which...

--Sykotic

[bluemaumau]

bringin this up again, ive got as early gze (single wire to standard o2 sensor) which now has blacktop extractors and a 2-1 section, i also have the o2 sensor.

it has 4 wires,

blue
black
black
white.

wtf do i do!

[sergei]

black wires are the heater wires.
Blue wire is the signal and white wire is the signal ground.
Someone correct me if I am wrong.
If you have propane/butane torch it is really easy to find which is which....
Hook multimeter in 1V DC range to blue and white wire (or grays) notice where positive and negative probe from multimeter goes to. Heat the oxygene sensor till it is red hot and submerse it in middle of flame, take notice of the reading -> if it is -1V (or close) then your negative probe is connected to signal wire if it is +1V (or close) your positive probe is connected to signal. If you are not getting any reading, check your connections, check if multimeter is set right, continue heating in tip of the flame for another a few minutes. If it does not produce reading and your multimeter is functioning and you have not got any connection problems, your oxygene sensor is stuffed. Make sure your propane/butane torch produces nice blue (hot) flame. This persirgure actually can bring back to life some of the old sensors which are covered in oil/ash.

[bluemaumau]

holy shit!

sergei your mad

i dont have a torch man

[matt dunn]

black wires are the heater wires.
Blue wire is the signal and white wire is the signal ground.
Someone correct me if I am wrong.

Sounds right to me