Converting to heated sensors?
Race Director
Joined: Feb 2004
Posts: 12,518
Likes: 19
The new sensor will have 2 white wires and 1 black. The black connects to the existing o2 wire. It is the signal to the ecm. One of the white wires goes to 12 volt ignition power. The other white goes to ground.
Melting Slicks
Joined: Jul 1999
Posts: 2,875
Likes: 0
From: Olive Branch (Memphis suburb) MS
Cruise-In II Veteran
Is this what you're looking for Steve? 
I've been meaning to put this in the for sell section since the DFI system going on has it's own wide band sensor. 
I've been meaning to put this in the for sell section since the DFI system going on has it's own wide band sensor.
Thread Starter
Le Mans Master
Joined: Feb 1999
Posts: 9,936
Likes: 38
From: South Carolina
St. Jude Donor '03 & '05
Originally Posted by Ramrod92
Is this what you're looking for Steve? I've been meaning to put this in the for sell section since the DFI system going on has it's own wide band sensor.
I've been meaning to put this in the for sell section since the DFI system going on has it's own wide band sensor.
Melting Slicks
Joined: Jul 1999
Posts: 2,875
Likes: 0
From: Olive Branch (Memphis suburb) MS
Cruise-In II Veteran
Mike, I don't think any of the LT1s came with heated sensors. Take a look at this heated O2 sensor link
Le Mans Master
Joined: Jan 2002
Posts: 9,036
Likes: 13
From: Edmonton AB
Thanks for the link.
Any idea why the MAF is chosen over, say, the switched 12VDC
source for the distributer? This is physically closer to the O2 location.
Is there a nearby MAF relay on the firewall to tap into?
Regarding the suggestion to use a 3-wire Weatherpack. Instead of
changing away from the OEM 1-wire connector on my '89, I am going
to transfer the sensor-side connector from an old O2 to the black
wire on a heated O2 so that I can retain the OEM connector on the
harness. I'll use a 2-wire connector for the 12VDC and ground leads.
.
Any idea why the MAF is chosen over, say, the switched 12VDC
source for the distributer? This is physically closer to the O2 location.
Is there a nearby MAF relay on the firewall to tap into?
Regarding the suggestion to use a 3-wire Weatherpack. Instead of
changing away from the OEM 1-wire connector on my '89, I am going
to transfer the sensor-side connector from an old O2 to the black
wire on a heated O2 so that I can retain the OEM connector on the
harness. I'll use a 2-wire connector for the 12VDC and ground leads.
.
Melting Slicks
Joined: Jul 1999
Posts: 2,875
Likes: 0
From: Olive Branch (Memphis suburb) MS
Cruise-In II Veteran
I don't know how well you can tell from the picture, but I used the wire w/connector from an old sensor so you don't have to cut your stock harness and you will be able to change the new 3 wire sensor out without any problem.
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Le Mans Master
Joined: Jan 2002
Posts: 9,036
Likes: 13
From: Edmonton AB
Originally Posted by mike t
Not sure what is advantage of heated.
tube headers, then there may be circumstances when an unheated
one does not warm up enough to create a signal.
With no signal from the O2, the ECM defaults to 'open-loop' mode
and modulates A/F based on predetermined values instead of
what it reads from the exhaust.
Several on-line sites have application guides to walk you through
a selection for your car and give you an idea of pricing.
.
Last edited by Slalom4me; Oct 9, 2005 at 02:10 PM.
Le Mans Master
Joined: Jan 2002
Posts: 9,036
Likes: 13
From: Edmonton AB
Originally Posted by Ramrod92
I don't know how well you can tell from the picture
on the link and hadn't looked closely enough at your harness.
I elected to get the 'Universal' version of a 3-wire heated sensor.
These are the same sensor but they are sold with an unfinished end
so I'm not trying hook to an existing Weatherpack.
.
Last edited by Slalom4me; Oct 9, 2005 at 01:42 PM.
Team Owner
Joined: Sep 2003
Posts: 88,393
Likes: 2
From: eville in
Originally Posted by Ramrod92
Mike, I don't think any of the LT1s came with heated sensors. Take a look at this heated O2 sensor link
