Heated Oxygen Sensor
Thread Starter
Burning Brakes
Joined: Apr 2002
Posts: 1,083
Likes: 0
From: Spanish Fork Utah
Heated Oxygen Sensor
Hey gurus,
Some of you, if not a lot of you use heated oxygen sensors. My '85 doesn't have a heated sensor, but I'm putting one in. I don't think with my new hooker headers that my O2 sensor can get up to 600 degrees to start functioning which is why I'm having problems. I have the instructions and it doesn't say which wire is hot, which plugs to the ECM and which is grounded.
It's a Borg Warner 3-wire sensor. Two wires are white, the other is black. Any best guesses? They are labeled A,B and C. A & B are the white ones. I'm just guessing, but black is probably ground. Don't know what to hook that to yet.
I'm thinking about wiring the hot into my fan since it is only on when the key is on. Does that sound good?
With the key turned to accessory, the O2 reads 451mV. As soon as I start the car, it reads 0 volts, which is causing the computer to dump all kinds of gas into it and then it throws a code saying the car is way lean, but it's not. I can smell it! ;)
Thanks,
Shayne
[Modified by sspackman, 6:46 PM 3/29/2003]
[Modified by sspackman, 6:48 PM 3/29/2003]
Some of you, if not a lot of you use heated oxygen sensors. My '85 doesn't have a heated sensor, but I'm putting one in. I don't think with my new hooker headers that my O2 sensor can get up to 600 degrees to start functioning which is why I'm having problems. I have the instructions and it doesn't say which wire is hot, which plugs to the ECM and which is grounded.
It's a Borg Warner 3-wire sensor. Two wires are white, the other is black. Any best guesses? They are labeled A,B and C. A & B are the white ones. I'm just guessing, but black is probably ground. Don't know what to hook that to yet.
I'm thinking about wiring the hot into my fan since it is only on when the key is on. Does that sound good?
With the key turned to accessory, the O2 reads 451mV. As soon as I start the car, it reads 0 volts, which is causing the computer to dump all kinds of gas into it and then it throws a code saying the car is way lean, but it's not. I can smell it! ;)
Thanks,
Shayne
[Modified by sspackman, 6:46 PM 3/29/2003]
[Modified by sspackman, 6:48 PM 3/29/2003]
Thread Starter
Burning Brakes
Joined: Apr 2002
Posts: 1,083
Likes: 0
From: Spanish Fork Utah
Re: Heated Oxygen Sensor (ski_dwn_it)
black is for the ecm and the white are +/-. DOesn't matter which is + or - on the white wires. Yeah the fan should be fine.
SS
Thread Starter
Burning Brakes
Joined: Apr 2002
Posts: 1,083
Likes: 0
From: Spanish Fork Utah
Re: Heated Oxygen Sensor (ski_dwn_it)
OK, I was going to hook this to the cooling fan but that isn't on all the time. I checked to see if there was a hot wire going to it and I couldn't find one. I found both wires going to the fan, I stripped a little sleeving away from each, and neither one had any volts to it. I grounded the other end of my multimeter.
I found the one that goes to the alternator, but that has 12V all the time with the key on or off, so I can't use that.
Do you have another suggestion?
I found the one that goes to the alternator, but that has 12V all the time with the key on or off, so I can't use that.
Do you have another suggestion?
Burning Brakes
Joined: Feb 2000
Posts: 871
Likes: 1
From: Westland MI.
Re: Heated Oxygen Sensor (sspackman)
The vapor canisterpurge solenoid, air divert valve, egr solenoid, or air select switching valve are all hot in run. They are all pink with a black stripe on the wire, and come from the 10a gauges fuse. I hooked my heated O2 sensor to the EGR solenoid wire, and it works only when the car is running. There are more hot in run wires under the hood, but any of these should work fine.
