Making o2 simms
Thread Starter
On The Tree
Joined: Apr 2002
Posts: 143
Likes: 0
From: Manhattan KS
Making o2 simms Has anyone done this. I have a pair of gutted cats, but I'm to cheap to buy o2 sims for $60-$100. Obviously it can be done since they sell them, but any one have instruction so that I don't have to spend my time figureing it out.
Thanks
Thanks
Staging Lane
Joined: Jan 2003
Posts: 50
Likes: 0
From: West Palm Beach, FL
Re: Making o2 simms I posted that as more of a question than a statement. My understanding of the o2 signal is that it is between 0 and 1volt. That's the full range of the o2 sensor. If that's true, I don't see why you couldn't just split that signal and send the same x.x volts to the PCM for both front and rear sensors.
Anyone?
Anyone?
Thread Starter
On The Tree
Joined: Apr 2002
Posts: 143
Likes: 0
From: Manhattan KS
Re: Making o2 simms I haven't looked real closely at them, but my thinking is that I could find what kind of voltage is coming out of the o2 sensor, run a switched 12v source, break it into a 1v source, and then tune it to what the o2 sensor is reading using another resistor. I'm thinking there is at least 2 wire going to the sensor though...I don't know if that's a 12v source, or a ground wire, a pre-heat wire, or what. Obviosly one of them is the signal wire.
Guess I have a little investigation for when it warms up.
Actually, looking at a few pictures of sponsors o2 sims, it looks like there is 4 wires. Hmmmm...
<small>[ February 10, 2003, 08:41 PM: Message edited by: Ackattack ]</small>
Guess I have a little investigation for when it warms up.
Actually, looking at a few pictures of sponsors o2 sims, it looks like there is 4 wires. Hmmmm...
<small>[ February 10, 2003, 08:41 PM: Message edited by: Ackattack ]</small>
Re: Making o2 simms </font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Ackattack:
<strong> I don't know if that's a 12v source, or a ground wire, a pre-heat wire, or what. Obviosly one of them is the signal wire.
looking at a few pictures of sponsors o2 sims, it looks like there is 4 wires. Hmmmm... </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Sounds like you might be on the right track. There are 4 wires on my sims....probubly a 12 volt, a ground, a pre-heat, and then the signal to the computer.
<strong> I don't know if that's a 12v source, or a ground wire, a pre-heat wire, or what. Obviosly one of them is the signal wire.
looking at a few pictures of sponsors o2 sims, it looks like there is 4 wires. Hmmmm... </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Sounds like you might be on the right track. There are 4 wires on my sims....probubly a 12 volt, a ground, a pre-heat, and then the signal to the computer.
Trending Topics
TECH Resident
Joined: Jan 2002
Posts: 754
Likes: 0
From: USA
Re: Making o2 simms The PCM has hardware logic for each O2.
The O2 has 4 wires, 2 are for the heater circuit itself.
The other 2, 1 is the output of the 02 and the other is an isolated return ground for the logic to compare to so you could not just splice the S2 (rears) to the S1 fronts for it would cause different voltage levels.
Also the since the S2s are used to determine AFR on startup, by using front O2 voltage levels might cause incorrect injector pulse width setting.
Also keep in mind the O2 wires are special and have a airchannel between the wire and the insulation O2 needs to compare to outside air and if you were to just splice wires to the S1 O2s you would lose that air source.
Your better off turning off the DTCs that would get tripped by PCM not seeing the S2 O2s via LS1edit
</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Lost Time:
<strong> I posted that as more of a question than a statement. My understanding of the o2 signal is that it is between 0 and 1volt. That's the full range of the o2 sensor. If that's true, I don't see why you couldn't just split that signal and send the same x.x volts to the PCM for both front and rear sensors.
Anyone? </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">
<small>[ February 11, 2003, 12:12 PM: Message edited by: Team ZR-1 ]</small>
The O2 has 4 wires, 2 are for the heater circuit itself.
The other 2, 1 is the output of the 02 and the other is an isolated return ground for the logic to compare to so you could not just splice the S2 (rears) to the S1 fronts for it would cause different voltage levels.
Also the since the S2s are used to determine AFR on startup, by using front O2 voltage levels might cause incorrect injector pulse width setting.
Also keep in mind the O2 wires are special and have a airchannel between the wire and the insulation O2 needs to compare to outside air and if you were to just splice wires to the S1 O2s you would lose that air source.
Your better off turning off the DTCs that would get tripped by PCM not seeing the S2 O2s via LS1edit
</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Lost Time:
<strong> I posted that as more of a question than a statement. My understanding of the o2 signal is that it is between 0 and 1volt. That's the full range of the o2 sensor. If that's true, I don't see why you couldn't just split that signal and send the same x.x volts to the PCM for both front and rear sensors.
Anyone? </strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">
<small>[ February 11, 2003, 12:12 PM: Message edited by: Team ZR-1 ]</small>
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
