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Spark plug question

Discussion in '2nd Gen. Tacomas (2005-2015)' started by BigJLarse83, Jul 11, 2010.

  1. Jul 11, 2010 at 9:54 PM
    #1
    BigJLarse83

    BigJLarse83 [OP] Well-Known Member

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    Ok, so I know that the 4.0 in the second gen comes from the factory with half denso/half ngk. My question is, if you have the plugs changed at the dealer, do they do the same thing? Or do they run all denso/ or all ngk? Reason I ask, I just got done changing my plugs and they were ngk down the driver and denso down the passenger. (I just put all Denso in it, $4 a pop) My truck has 87k miles on it! See where I am going with this? I was told these were 30k plugs. If I went 87k with them, no wonder my mileage was starting to suffer and my idle was getting a wee rough.
    Oh and I bought the truck with 70k on it, I didn't go all those miles before thinking to check plugs.
     
  2. Jul 11, 2010 at 9:58 PM
    #2
    Hondarider08

    Hondarider08 "That's what she said..."

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    I'm not sure if the dealer does the same thing as the OEM plugs with half and half. They might do that because its a factory thing. I went and bought some high dollar iridium tipped plugs, gapped them to spec, and threw them in myself. If I were you I would too. I'm sure if you talked to the dealer they would put whatever you wanted in there.
     
  3. Jul 11, 2010 at 10:02 PM
    #3
    BigJLarse83

    BigJLarse83 [OP] Well-Known Member

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    And you had good result with that? From the reviews I have read on here everyone is saying to just stay with the stockers. I suppose I could give it a try at the next 30k service. I just went with the desno's this time around. Oh and it really isn't that hard to do yourself either, I was pleasantly surprised. It took me about an hour.
     
  4. Jul 11, 2010 at 10:22 PM
    #4
    humanoid

    humanoid bite me

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    Every dealer you ask will probably give you a different answer, the best thing to do would be to call them up and ask them.
     
  5. Jul 11, 2010 at 10:29 PM
    #5
    BigJLarse83

    BigJLarse83 [OP] Well-Known Member

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    Not really too worried about it. I just wanted to figure out if it really did make it 87k on the original plugs...
    Like I said, I bought it with 70k from a girl that moved to Utah from SoCal (PreRunner+heavy winter snow+no experience driving in it= one sweet deal for me!!) so I would have no idea if or where she had it serviced.
     
  6. Jul 11, 2010 at 10:35 PM
    #6
    stmpjmpr

    stmpjmpr Well-Known Member

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    i havent bothered reading the manual. so what is the recommend time to replace plugs?. and what plugs would you guys recommend to use?
     
  7. Jul 11, 2010 at 10:36 PM
    #7
    BakoTruck

    BakoTruck Well-Known Member

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    Mostly stock for now, I have added a cb radio, various cheap mods and I plan on adding aftermarket wheels and other items in the future.
    I don't know, but I'm guessing they put all of the same plugs in on both sides.
    She probably didn't change the plugs since a lot of people awesome they can go up to 100k miles before changing on these trucks.
     
  8. Jul 11, 2010 at 10:38 PM
    #8
    BakoTruck

    BakoTruck Well-Known Member

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    Mostly stock for now, I have added a cb radio, various cheap mods and I plan on adding aftermarket wheels and other items in the future.
  9. Jul 12, 2010 at 4:51 PM
    #9
    stmpjmpr

    stmpjmpr Well-Known Member

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    thanks bako..great write up. guess I know what I will doing this weekend...actually looking forward to it.
     
  10. Sep 17, 2016 at 11:28 AM
    #10
    Jrs99

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    So I just changed my plugs today at 197.5k miles and they are half Denso, half NGK.
    These cant be the original plugs can they?!? I bought the truck back in Feb 2014 with 115k miles on it. Never had a problem until recenty and lately the trucks been running a bit crappy. I'm really hoping this and some Seafoam in the gas tank will smooth it back out.
    Porcelain is cracked on one of them...
    [​IMG]
     
  11. Sep 17, 2016 at 11:30 AM
    #11
    Mush Mouse

    Mush Mouse Club Soda Not Seals

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    its a Toyota truck and that's all the modifications needed
  12. Sep 17, 2016 at 11:47 AM
    #12
    10trdtaco

    10trdtaco American Infidel *DON'T TREAD ON ME*

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    Mine had been original for 75k, I've heard the dealers put all one manufacture in the vehicles ... so I'm assuming your in the same boat... but 197k!!!! Dang.
     
  13. Sep 17, 2016 at 12:01 PM
    #13
    Norton

    Norton Well-Known Member

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    Unless something's changed, 1/2 Denso + 1/2 NGK is how they come from the factory. It's doubtful the previous owner(s) bothered to buy/replace them that way, so I'd say your plugs were probably original.
     
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  14. Sep 17, 2016 at 1:00 PM
    #14
    Maticuno

    Maticuno Resident Pine Swine

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    +1. And they do look fairly spent. The Denso's look slightly less crappy than the NGK's, especially since they didn't crack.
     
  15. Sep 17, 2016 at 5:04 PM
    #15
    Gabezz

    Gabezz Well-Known Member

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    Yup, this is my second time I personally have replaced the plugs in my truck, first was about 40K, and just a few weeks again about 70K on the ODO. I just stop by the Stealership, ask for the plugs for the 1GR-FE, they hand me 6 Denso plugs, all pre gapped, and I say Sayonara!. Also check eBay, dealerships sell them dirt cheap there, and same OEM plugs. Installed with No issues whatsoever, my truck runs great.
     
  16. Sep 17, 2016 at 6:10 PM
    #16
    jsnm23

    jsnm23 There are no solutions; only tradeoffs.

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    197k on those! I bet you notice a huge difference in performance after you replace em.
     
  17. Sep 17, 2016 at 6:24 PM
    #17
    cosmicfires

    cosmicfires Well-Known Member

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    Those plugs don't look too bad for 197,000 miles. It was way past time to replace them however.
     
  18. Sep 17, 2016 at 6:27 PM
    #18
    Bishop84

    Bishop84 Well-Known Member

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    I've done hundreds of plugs and I've never seen mixmatched like that. NGK branded plugs like that is aftermarket for Toyota. Something was done in the past, the dealership might have run out of plugs that day and used aftermarket to finish the job.
     
  19. Sep 17, 2016 at 6:41 PM
    #19
    jsnm23

    jsnm23 There are no solutions; only tradeoffs.

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    Toyota installs mix matched plugs from the factory. I bought my truck brand new and when I replaced the plugs for the first time I found NGK on one side and denso on the other
     
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  20. Sep 17, 2016 at 9:57 PM
    #20
    Norton

    Norton Well-Known Member

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    I respectfully disagree. Toyota has installed 1/2 & 1/2 on the assembly line for years, dating back to at least the 1st Gen days.

    +1.
     
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