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Spark plug change at what mileage?

Discussion in '2nd Gen. Tacomas (2005-2015)' started by terry13, Jan 19, 2012.

  1. Jan 19, 2012 at 6:58 AM
    #1
    terry13

    terry13 [OP] Active Member

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    Hello. On a 4.0 V-6 at what mileage have you or recommened changing the spark plugs? I am coming up on 20k on my truck and a guy I work with had to change his at 25k because it started mis-firing. His plugs looked like crap when he pulled them out. Very dark and burnt looking. So was wondering if i should plan on doing this soon. Seems that is very low mileage for a change.
     
  2. Jan 19, 2012 at 7:03 AM
    #2
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    30k miles.
     
  3. Jan 19, 2012 at 7:10 AM
    #3
    jeremy_283

    jeremy_283 Super Member

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    30,000 miles like Chris said but does this other guy's car have a carburetor? It sounds like something isn't right.
     
  4. Jan 19, 2012 at 7:11 AM
    #4
    pegcitytacoma

    pegcitytacoma TRD OFROAD

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    I've got a first gen and did the first plug change at 150,000 km the plugs looked pretty good for the mileage, it wasn't missing or anything but after the change the idle was nice and smooth and acel was nice and smooth too. If you are changing plugs like your buddy there something is up unless he's towing or beating the shit out of his truck. Just my opinion
     
  5. Jan 19, 2012 at 7:13 AM
    #5
    Yoytoda

    Yoytoda The Little Truck That Could

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    RTM lol
     
  6. Jan 19, 2012 at 7:16 AM
    #6
    Pugga

    Pugga Pasti-Dip Free 1983 - 2015... It was a good run

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    Manual says 30k miles. I did mine at 40k miles and they didn't look terrible.
     
  7. Jan 19, 2012 at 8:17 AM
    #7
    nammer

    nammer Well-Known Member

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    i bought my truck with over 80K, ran great, changed the plugs myself, and they were the original plugs in there.
     
  8. Jan 19, 2012 at 8:18 AM
    #8
    nammer

    nammer Well-Known Member

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    but i would go with the 30K interval
     
  9. Jan 19, 2012 at 8:47 AM
    #9
    terry13

    terry13 [OP] Active Member

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    Thanks for the replies. My friends isnt carburated. He has a 2008 4 liter. i think he may abuse his more than i do mine. I did see in the manual where it said to change them.
     
  10. Jan 20, 2012 at 11:25 AM
    #10
    House Doc

    House Doc Active Member

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    I changed my son's out last weekend, 105,000 MI. Gap was .065.
    I ordered the plugs off Amazon, saved a few bucks on each plug and no travel time. Delivered in about 4 days.I would say you are safe to go 40K on originals unless you are having an issue.
     
  11. Jan 20, 2012 at 11:32 AM
    #11
    nammer

    nammer Well-Known Member

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    does it make a big deal if the gap is larger than it should be (.04)? or has worn down? or is it just fine until it's gone?
     
  12. Jan 20, 2012 at 12:19 PM
    #12
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    Every plug has a max operational gap. Once it is exceeded, you can have miss fires, or other issues.
     
  13. Jan 20, 2012 at 12:45 PM
    #13
    nammer

    nammer Well-Known Member

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    thanks, do you happen to know roughly where .065 rates on operational usage, like can it go to .08, or is it getting close? and i'm just referring to the oem plugs.
     
  14. Feb 20, 2012 at 1:29 PM
    #14
    over60

    over60 "Grumpy Old Guy"

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    Maybe I'll pull mine and look to see how they are...I've got 80,000Kms on her (50,000 miles).... 2006 4.0 v6.

    I'm not having any miss or any issues, but I guess I should chenk 'em.

    Toodles..
     
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