Wideband o2 Placement
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2004-2007 Cadillac CTS-V General Discussion Discussion, Wideband o2 Placement in Cadillac CTS-V Series Forum - 2004 - 2007; I was just wondering what the best place to install my wideband o2 sensor would be? I am planning on ...
  1. #1
    SkullV's Avatar
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    Wideband o2 Placement

    I was just wondering what the best place to install my wideband o2 sensor would be? I am planning on mounting it permanently and can deal with the fact that I will probably have to replace the sensor yearly. Can I just put it in one of the bungs for the post-cat o2s since they are already tuned out? Or should I have a bung welded in pre-cat right after the pre-cat o2s? Which bank should I install it in? Driver side or passenger side? Thanks!

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    CTSV_510's Avatar
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    Re: Wideband o2 Placement

    You want it put in pre-cat.

    You can either weld in a separate bung, or you can actually replace one of your stock sensors with the wideband but you need to wire it in properly so it only shows to the PCM as a narrowband.

    http://www.ls1tech.com/forums/pcm-di...same-time.html

    more good info if you haven't read it:
    http://www.ls1tech.com/forums/pcm-di...1-31-07-a.html

    another good place to hang out:
    http://forums.corvetteforum.com/zeroforum?id=91

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    Re: Wideband o2 Placement

    I think you need two of them to make sure both banks are running well you wouldn't want one side running lean now would you?


    Oh yeah... pre cat... gotta be pre cat

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    Re: Wideband o2 Placement

    Quote Originally Posted by nmaier2201 View Post
    I think you need two of them to make sure both banks are running well you wouldn't want one side running lean now would you?

    Oh yeah... pre cat... gotta be pre cat

    There is no way to really tune one bank vs. the other is there? So even if there was a small inbalance it would still be something you couldn't fix...right?

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    NormV is offline Cadillac Owners Connoisseur
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    Re: Wideband o2 Placement

    Further up stream the better. For convience put it post cat. Some tuners place the wb inside the tail pipe!

    So placement doesn't really matter.


    Norm

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    Re: Wideband o2 Placement

    I am looking to put mine on the top of the collector on the header pipe - both headers.

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    Re: Wideband o2 Placement

    Quote Originally Posted by SkullV View Post
    There is no way to really tune one bank vs. the other is there? So even if there was a small inbalance it would still be something you couldn't fix...right?
    Yeah that was a joke.... Having two is only good in case something goes wrong... if you see one bank running lean or richer than the other then you know to check your engine out.

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    Re: Wideband o2 Placement

    Quote Originally Posted by nmaier2201 View Post
    Yeah that was a joke.... Having two is only good in case something goes wrong... if you see one bank running lean or richer than the other then you know to check your engine out.
    Thought so. I have been reading so much about tuning and widebands the last couple of days it's making my brain hurt! Between reading about this this, work, and summer school I don't know what time I'm even going to have to try and start tuning the car (well playing with tunes I already love the tune it has in it!)!

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    945liter is offline Cadillac Owners Fanatic
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    Re: Wideband o2 Placement

    Cylinder #7 is most prone to run lean on lsx so logically i run mine on the driver side.

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    Re: Wideband o2 Placement

    Quote Originally Posted by 945liter View Post
    Cylinder #7 is most prone to run lean on lsx so logically i run mine on the driver side.
    Driver side it is!

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    Re: Wideband o2 Placement

    Driver's post cat is where mine is. It's off unless I turn it on when tuning.


    Norm

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    Re: Wideband o2 Placement

    So, did you decide where your going to mount it?
    Got mine in Friday. Just can't find the time to install it.

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    Re: Wideband o2 Placement

    I'm going with the header collector on the driverside right next to the narrowband o2. Which setup did you get?

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    Re: Wideband o2 Placement

    Quote Originally Posted by SkullV View Post
    I'm going with the header collector on the driverside right next to the narrowband o2. Which setup did you get?
    I got the LC-1
    Might put it in place of the rear sensor.

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    Re: Wideband o2 Placement

    Quote Originally Posted by Twitch View Post
    I got the LC-1
    Might put it in place of the rear sensor.
    From what I understand you won't want to put it post cat because it will give you a leaner reading then the true reading. I got the LC-1 too, but Trambow gave me a full LM-1 kit with the HPtuners stuff so i may go with the LC-1 to run the A/f protection on my nitrous controller and my gauge and the LM-1 for tuning.

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