4 wire O2 sensor

[abiba_69]

Quick question... What wire do i use on a 4 wire O2 sensor for an A/F gauge?

The car is an 89 2.5L TI daytona

[shlbyZ]

Quote:

Originally Posted by abiba_69 Quick question... What wire do i use on a 4 wire O2 sensor for an A/F gauge? The car is an 89 2.5L TI daytona

4 wire o2 sensors have 2 white wires, 1 gray and 1 black. THE BLACK ONE IS THE WIRE YOU TAP INTO.

I would suggest grounding it to the battery aswell and if you have a Autometer AF gauge, I would install a kill switch as it gets very annoying at night.

Also, recommended to solder and a good taping or shrink wrapping for this one as the smallest bit of line interference can throw off the gauge.

[abiba_69]

Sweet! Ok, now that i know what wire, i planned on just cutting the plug from the harness(have a spare wire harness) and just using that. Now, i should ground the black wire that i'm using for the gauge? And what do you mean by an autometer?

Thanks,

Chris

[shlbyZ]

Quote:

Originally Posted by abiba_69 Sweet! Ok, now that i know what wire, i planned on just cutting the plug from the harness(have a spare wire harness) and just using that. Now, i should ground the black wire that i'm using for the gauge? And what do you mean by an autometer? Thanks, Chris

autometer as in a brand name, thier AF gauges are just really annoying at night,

[kuleinc]

The autometer A/F gauge in my turbo Geo Storm always got the ladies lol I like em... What car do I get a four wire plug from to fit my 89 H car?

[Zenarc]

Someone said you can put this on a older style car, so how would i do this on my 86 GLH and what are the advantages if there are any at all.

[85OMNI]

ok, this might be a stupid question...I have an 85 omni glh-t that needs an 02 sensor. I have an A/F gauge i need to hook up as well. Its a one wire sensor, so do i just hook the sensor to the gauge and thats it? Does the 02 sensor normally hook to something else? With one wire i just feel limited as to what i can do...

[tryingbe]

You tape into that wire. The computer also uses that wire to see if the engine is running rich or lean.

[joefus25]

FYI - you should not cut into an oxygen sensor wiring harness (sensor harness itself before the plug) because many types of sensors recieve thier outside air sample from inside the wire insulation (it is special wire). If it is not crimped properly, your sensor will be thrown off because of an inaccurate reading of outside air.

[crazymadbastard]

Quote:

Originally Posted by joefus25 FYI - you should not cut into an oxygen sensor wiring harness (sensor harness itself before the plug) because many types of sensors recieve thier outside air sample from inside the wire insulation (it is special wire). If it is not crimped properly, your sensor will be thrown off because of an inaccurate reading of outside air.

I never heard of that. I think that someone is pulling your leg. The biggest issue has to be in changing the resistance or capitance of the circuit. This must be minimal since most here are running gauges just fine. These sensors are just that, they do not have some kind of computer inside to sample or calibrate themselves.
Thats probably why they are $30-75 instead of hundreds.The reason I would tap into the car's harness is so that when it is time to replace the sensor, I do not have to re-crimp or solder the gauge's wire.

[BlueBaron]

Quote:

Originally Posted by joefus25 ...many types of sensors recieve thier outside air sample from inside the wire insulation (it is special wire).

Outside air sample?? If there was such a thing, how does air get through the heat resistance insulation??

[JrVipr]

Quote:

Originally Posted by joefus25 FYI - you should not cut into an oxygen sensor wiring harness (sensor harness itself before the plug) because many types of sensors recieve thier outside air sample from inside the wire insulation (it is special wire). If it is not crimped properly, your sensor will be thrown off because of an inaccurate reading of outside air.

Any heated O2 sensor gets it ambient sample from the wiring between the strands of copper and the sheathing, You can't solder it since it will corupt the readings.

[BlueBaron]

I always thought an O2 sensor worked on exhaust temp, sending a specific voltage reading to the computer.

How can temperature be measured by a wire?

[lebaron dude]

The O2 "sensor" is not so much a sensor as it is a generator. It generates a voltage based on a differential.

The differential in question is the amount of O2 in the exhaust pipe versus the amount of O2 in the outside air. Therefore, some piece of the "sensor" must be exposed to free air like in the engine bay. (i.e. it cannot be completely sealed)

Also, this phenomenon doesn't occur at ambient temperatures and thus the reason for the heating element to speed the ability for the "sensor" to begin generating voltages.

[amcpacer]

I dont think the sensor gets its fresh air from up the wire. It instead receives fresh air from the top of the sensor right where the wires enter the sensor.