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Just finished spark plug change...they were...

Discussion in 'Technical Chat' started by Masada, Sep 27, 2009.

  1. Sep 27, 2009 at 3:54 PM
    #1
    Masada

    Masada [OP] Well-Known Member

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    Gapped wrong from the factory. I checked the GAP on all of them 3 Denso's and 3 NGK's all from 46 to 55 GAP. What the heck?

    Anyone else have a similar issue?

    Just wanted to say a specail thanks to Chris4x4 for the write up, made it easy to do. Thanks man, in this short amount of time on this sight I can see you are a very helpful person :)
     
  2. Sep 27, 2009 at 3:59 PM
    #2
    tcBob

    tcBob Gringo Bandito Moderator

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    subscribed
     
  3. Sep 27, 2009 at 4:01 PM
    #3
    luk8272

    luk8272 Poodoo

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    I am interested as well i'll have to change mine one day.
     
  4. Sep 27, 2009 at 4:10 PM
    #4
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    I dont think they are gapped wrong from the factory. I have pulled the plugs on a new Tacoma :spy: and the plugs were all in the .040 range. At 30K miles, it seems the NGK's are closer to .055 while the Densos are around .044 to .048. When changing the plugs, this is why I recomend useing all Denso plugs, as they seem to hold their gap for a longer period.

    And thank you for the kind words. :)
     
  5. Sep 27, 2009 at 4:37 PM
    #5
    Masada

    Masada [OP] Well-Known Member

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    I don't know man, I pulled them out and then checked the gap just for fun and they were all over gapped. Maybe it was because they weren't changed at 30K? The truck has just under 40K now, maybe next year I will change them out to the Denso, but the dealership parts store wasn't open today :(.

    All I know is it freaked my out...
     
  6. Sep 27, 2009 at 4:44 PM
    #6
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    If you had NGk's on one side, and Denso plugs on the other, I would say they havent been changed. You need to change them at 30K.
     
  7. Sep 27, 2009 at 4:46 PM
    #7
    TicTacOma

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    It's all in my head at the moment...
    Do you really think they were over-gapped from the factory or maybe just WORN? :rolleyes: With the mileage you mentioned I'm thinking they just "opened" with normal wear and tear. I'm assuming plugs do not stay at the recommended gap for life, hence the reason for "changing" them out....

    If I'm thinking incorrectly....I am willing to be set straight.
     
  8. Sep 28, 2009 at 10:28 AM
    #8
    Masada

    Masada [OP] Well-Known Member

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    It is as you stated, they had not been changed yet. I just got the truck on Tuesday night from the dealer as a used certified Toyota, so I didn't know if they changed the plugs or not. My next thing is to look at the throttle body and see if it needs a good scrub down, the truck is idling a little ruff after it warms up.
     
  9. Sep 28, 2009 at 10:49 AM
    #9
    T@co_Pr3runn3r

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    At least your certified had sensbile plugs in it. My "certified" had effin POS autolites in it.
     
  10. Sep 28, 2009 at 11:20 AM
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    65tacodude

    65tacodude Well-Known Member

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    Do they come from the factory with two different brands? Has anyone tried those E3 or whatever their called?
     
  11. Sep 28, 2009 at 11:28 AM
    #11
    Masada

    Masada [OP] Well-Known Member

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    Sensible or not they should have been changed 10k miles ago...oh well, my truck has found a good new home...
     
  12. Sep 28, 2009 at 12:29 PM
    #12
    bubba

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    I know this is a stupid question but why would they use twp different spark plugs??
    and Why are they not using an Iridium Plug instead of standard on the V-6
     
  13. Sep 28, 2009 at 1:10 PM
    #13
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    The E-3's are just hype. Use OEM.

    Cost. The engine ignition is designed for useing a nickle/copper plug. You cant just throw any plug in, and expect results. Plugs have different temp ranges, resistance, etc. Best to use what the manual says, as I have found the other plugs actually give reduced performance.
     
  14. Sep 28, 2009 at 1:15 PM
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    T@co_Pr3runn3r

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  15. Sep 28, 2009 at 1:58 PM
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    TicTacOma

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  16. Sep 28, 2009 at 3:46 PM
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    Masada

    Masada [OP] Well-Known Member

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    Ok the man love is getting a little thick in here...lol :)
     
  17. Sep 28, 2009 at 3:55 PM
    #17
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    I don't think any one has discovered why Toyota does this.
    X2 on the man love.
     
  18. Sep 28, 2009 at 4:13 PM
    #18
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    My Friends and I have an idea. Not sure if its valid, and I cant get ahold of anyone to varify, or dipute. Anyway....The resistance from the driver side to the passenger side is slightly different. Not much, but a little. We have figured that Toyota is useing a plug requireing less resistance to reliably fire, and/or a less expensive plug.....Even at a $0.05 difference ofver a few hundred thousand vehicles, is a good savings. Just my friends and my idea.
     
  19. Sep 28, 2009 at 4:16 PM
    #19
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    Is this only found on the 4.0? I think it was found on the 3.4 also but I can't remember.:eek:
     
  20. Sep 28, 2009 at 4:17 PM
    #20
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    Yes....and the 3.0, and a friend said he found the same thing on a Camry V6, but he never sent pics, so I cant be sure.
     
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