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should I get a new o2?

Discussion in 'Performance and Tuning' started by ETaco23, Mar 15, 2009.

  1. Mar 15, 2009 at 6:16 PM
    #1
    ETaco23

    ETaco23 [OP] Marshall offroad Fabrication

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    Im ganna be going to the dealer tomarrow to get new denso plug wires, and was thinking of seeing about a new o2 A/F sensor. Bc of my verry crappy gas mileage, and rough idle. Should I?
     
  2. Mar 15, 2009 at 6:26 PM
    #2
    tacomaman06

    tacomaman06 Carolina Alliance: Enforcer

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    getting there....
    if you dont have a cel..........nothing likely wrong with the o2 sensor. yoiu can always try if you must tho.
     
  3. Mar 15, 2009 at 6:35 PM
    #3
    AUDITECH

    AUDITECH Carolina Alliance: LAZY DIVISION

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    I wouldnt unless that cel is coming on try just the wires first
     
  4. Mar 15, 2009 at 6:39 PM
    #4
    ETaco23

    ETaco23 [OP] Marshall offroad Fabrication

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    Alright. But I know of a couple people that haven't had a CEL, and were getting 12-14mpgs. And as soon as they got a new sensor it jumped back up to 19-20. But I will try wires first see what happens. Maybe clean my TPS and then check my mpg's. But if it doesn't get better, I think I should change my o2.
     
  5. Mar 15, 2009 at 7:11 PM
    #5
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    O2 sesnro shouldn't give you bad gas mileage. It just monitors the CAT effeciency. The AFR sensor will be the one to change.
     
  6. Mar 15, 2009 at 7:30 PM
    #6
    ETaco23

    ETaco23 [OP] Marshall offroad Fabrication

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    Thats the one Im talking about! If it was going bad, could it also give me a rough idle at stop lights in gear? Almost like it is running lean.
     
  7. Mar 15, 2009 at 7:40 PM
    #7
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    I have never heard of an AFR causing a rough idle.
     
  8. Mar 15, 2009 at 7:55 PM
    #8
    ETaco23

    ETaco23 [OP] Marshall offroad Fabrication

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    K, But If my mpg's dont get better. My next geuss is, faulty A/FR sensor. I think I should replace it anyways. Going on 110K miles!
     
  9. Mar 15, 2009 at 7:57 PM
    #9
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    it cant hurt to replace it.
     
  10. Mar 15, 2009 at 7:58 PM
    #10
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    Is there two on the V6?
     
  11. Mar 15, 2009 at 7:59 PM
    #11
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    1 in front of the cats, and 1 after them. Both sides for a total of 4.
     
  12. Mar 15, 2009 at 8:03 PM
    #12
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    Thats what I meant, two afr's and two O2's.
     
  13. Mar 15, 2009 at 8:04 PM
    #13
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    4.10 gears, sliders, and lots of buttons.
    Ah, gotcha.
     
  14. Mar 15, 2009 at 8:05 PM
    #14
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    Take the tin foil hat off so you can read my mind...........:D
     
  15. Mar 15, 2009 at 8:07 PM
    #15
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    Oooo....Sorry....Forgot that thing was on....

    Ok.....thats better.....wait.........wait....HEY!!!!!:eek:

    Hats going back on!!!!!
     
  16. Mar 15, 2009 at 8:08 PM
    #16
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    :rofl: :rofl: :rofl:
     
  17. Mar 15, 2009 at 8:49 PM
    #17
    ETaco23

    ETaco23 [OP] Marshall offroad Fabrication

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    So when I replace my sensors. should I replace both AFR sensors?
     
  18. Mar 15, 2009 at 9:01 PM
    #18
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    Those sensors are $170 a pop from URD. Imagine what they will cost from the dealer. That's a pretty expensive investment for an unknown cause. You should be throwing a code if one of those is bad.
     
  19. Mar 15, 2009 at 9:12 PM
    #19
    ETaco23

    ETaco23 [OP] Marshall offroad Fabrication

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    Yep! I know. I wont replace them, yet. I know a place were I can get them for 140. But thats still spendy! I just was wondering, when or if I do change them, should I change both AFR sensors?
     
  20. Mar 16, 2009 at 5:53 AM
    #20
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    If your not throwing a code, your gonna have to replace both. Right now, your kinda chaseing a gost.....not knowing exactly what the issue is. Try the wires first and see what that does for ya.
     
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