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Spark Plugs for 4 Cylinder 2.7 Engine

Discussion in '2nd Gen. Tacomas (2005-2015)' started by wingspar, Apr 22, 2024.

  1. Apr 22, 2024 at 6:15 PM
    #1
    wingspar

    wingspar [OP] Well-Known Member

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    I asked a question in the spark plug part of this forum, but got no response even tho others posted questions after me. It seems like everything I’ve ever seen about spark plugs in this forum are about the 6 cylinder engines that have two different brands of spark plugs, but does that hold true for 4 cylinder engines also, or are all 4 plugs of the same brand ok. I had a V6 in my older 1993 SR5 but didn’t feel like spending the extra money for the v6 when I bought my 2011 brand new.

    Till I read about plugs in this forum, I had never heard of Denso Plugs before and people seem to rave about them. My question is are all 4 plugs supposed to be the same brand or should I use two of one brand and two of another? If all one brand, I’m considering Denso’s.
     
    Robnik likes this.
  2. Apr 22, 2024 at 6:25 PM
    #2
    Finbox

    Finbox Well-Known Member

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    I have a 2015 4 banger- got the Denso Iridium Plugs from RockAuto - all 4 the same. I think the Denso plugs are the OEM supplier - No Complaints, but its not Friday.
     
  3. Apr 22, 2024 at 6:28 PM
    #3
    Dm93

    Dm93 Test Don't Guess

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  4. Apr 22, 2024 at 6:28 PM
    #4
    216to404

    216to404 Well-Known Member

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    I just replaced the plugs on my 2.7. They were the original plugs, and all 4 were denso iridiums. I installed new denso iridiums right back in their place.
     
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  5. Apr 22, 2024 at 10:21 PM
    #5
    wingspar

    wingspar [OP] Well-Known Member

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    Thank you for the replies. 4 Denso Iridiums it will be. I have about 56k miles on the original plugs. It’s probably time. Runs a little rough at idle.
     
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  6. Apr 22, 2024 at 10:54 PM
    #6
    Robnik

    Robnik Disciplined Maniac

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    You'll be good with Denso.

    I prefer NGK, but that's just me. :)
     
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  7. Apr 22, 2024 at 11:17 PM
    #7
    Diablo169

    Diablo169 ROKRAPR

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    OEM plugs bro. Did the 11’s come with iridium?
     
  8. Apr 23, 2024 at 6:24 AM
    #8
    snowdrifter

    snowdrifter Active Member

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    If it's running rough at 56k miles, I doubt new plugs will help. They're supposed to be good for 100k miles. Not trying to discourage you from changing them, it's a relatively cheap and easy swap and peace of mind.

    I swapped out my originals a year ago.
    https://www.tacomaworld.com/threads/how-to-change-sparkplugs-2tr-fe.157316/page-9#post-28653884
     
    Jimmyh likes this.
  9. Apr 23, 2024 at 6:45 AM
    #9
    Finbox

    Finbox Well-Known Member

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    With the rough idle - try cleaning the MAF sensor and PVC valve. Both easy & cheap.
     
  10. Apr 23, 2024 at 7:11 PM
    #10
    kidthatsirish

    kidthatsirish Well-Known Member

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    I've done both the denso at 100k and ngk at 200k.

    Both sets were great, wore evenly and I have no complaints.
     
    wingspar[OP] likes this.
  11. Apr 23, 2024 at 10:08 PM
    #11
    wingspar

    wingspar [OP] Well-Known Member

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    I have no idea. Does anyone know?
     
  12. Apr 23, 2024 at 10:20 PM
    #12
    wingspar

    wingspar [OP] Well-Known Member

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    I read somewhere recently that rough idling was caused by plugs and they have about 56k miles on them. I’m not a mechanic, so my knowledge is limited.
     
  13. Apr 23, 2024 at 10:21 PM
    #13
    wingspar

    wingspar [OP] Well-Known Member

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    Might try that. I saw a thread the other day that had everything under the hood labeled if I can find that thread again.
     
  14. Apr 24, 2024 at 12:56 PM
    #14
    tak1313

    tak1313 Well-Known Member

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    Denso! But @ 56K, they SHOULDN'T be the problem (but it's not like it never happens). Are there codes? What is "runs a little rough at idle?"
     
  15. Apr 24, 2024 at 12:58 PM
    #15
    Diablo169

    Diablo169 ROKRAPR

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    If they were Amazon Denso’s then they could be bad at 56k
     

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