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Spark plug replacement question - 2004 Prerunner 2.7L

Discussion in '1st Gen. Tacomas (1995-2004)' started by Suspender, Dec 5, 2017.

  1. Dec 5, 2017 at 11:03 AM
    #1
    Suspender

    Suspender [OP] Well-Known Member

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    I recently replaced the spark plugs in my 2004 Prerunner, at 120k per scheduled maintenance guide. First time doing it, I just went with the first option that fit my model which ended up being Bosch iridium (pre-gapped, which I measured at 40). I have this sneaking suspicion that I might have lost a little bit of power, but I may also be paranoid. Am I? (original plugs were NGK)

    Further research showed that a lot of guys like NGK for Asian cars and Bosch for European cars, but idk what the difference is... Thoughts?
     
  2. Dec 5, 2017 at 11:07 AM
    #2
    BillsSR5

    BillsSR5 Well-Known Member

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    I would stick with DENSO or NGK
     
    cosmicfires and boostedka like this.
  3. Dec 5, 2017 at 1:43 PM
    #3
    Greensystemsgo

    Greensystemsgo 1 owner with clean car fox.

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    Iridium, or double iridium? Also, change your wires while your in there.

    Edit, 2.7, no wires, my bad.
     
    Last edited: Dec 7, 2017
  4. Dec 5, 2017 at 1:50 PM
    #4
    BillsSR5

    BillsSR5 Well-Known Member

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  5. Dec 5, 2017 at 4:45 PM
    #5
    Suspender

    Suspender [OP] Well-Known Member

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  6. Dec 6, 2017 at 11:58 AM
    #6
    BillsSR5

    BillsSR5 Well-Known Member

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  7. Dec 6, 2017 at 9:57 PM
    #7
    Revco

    Revco Got that PMA

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    I run NGKs in my 3RZ, every 15k miles I swap them out. Sounds frequent, but I'm OCD about maintenance, plus it's cheap and takes 10 minutes to do after an oil change.

    You won't feel a loss in power over spark plugs. A test across the board of all available plugs/brands/types would likely show a 0-3hp difference, which you'd never feel from the seat. If anything, maybe you didnt fully seat a plug wire, causing a weak spark on a cylinder, but that may bring a CEL.
     
  8. Dec 7, 2017 at 12:47 AM
    #8
    ghs57

    ghs57 Well-Known Member

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    Pretty much stock with a small lift and Timbrens
    I went with Denso last change.

    I'm not sure what wires you would change as the coils (4) sit on each plug on an '04 3RZ.
     
  9. Dec 7, 2017 at 7:53 AM
    #9
    Greensystemsgo

    Greensystemsgo 1 owner with clean car fox.

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    Fixed :thumbsup:
     
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