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NGk iridium 9 6619

Discussion in '2nd Gen. Tacomas (2005-2015)' started by Chungaz, Oct 6, 2017.

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  1. Oct 6, 2017 at 12:57 PM
    #1
    Chungaz

    #1
    Chungaz [OP] Well-Known Member

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    I put the NGk iridium 9 in my truck and gas mileage and power totally sucks now. I’ve lost almost a 100 Miles to a tank. Anyone else experience this with these plugs? No other work was done at all. And any suggestions for different plugs.
     
    Chungaz, Oct 6, 2017
    #1
  2. Oct 6, 2017 at 12:59 PM
    #2
    Unchained 5150

    #2
    Unchained 5150 Rick

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    Put in 6 Denso plugs, and did you do it or a garage? Not gapped properly maybe.
     
    Unchained 5150, Oct 6, 2017
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  3. Oct 6, 2017 at 1:01 PM
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    Chungaz

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    Chungaz [OP] Well-Known Member

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    I did it it. Gapped at .043 from factory and I checked each and everyone of them before I installed them.
     
    Chungaz, Oct 6, 2017
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  4. Oct 6, 2017 at 1:05 PM
    #4
    Unchained 5150

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    Unchained 5150 Rick

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    Something definitely is wrong then wish I had answers for you
     
    Unchained 5150, Oct 6, 2017
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  5. Oct 6, 2017 at 1:13 PM
    #5
    Chungaz

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    Chungaz [OP] Well-Known Member

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    Thanks anyways.@unchained5150. I called to verify they were the correct plugs at Oreillys and they confirmed they were correct. Anyone have the correct prt# for the Denso plugs?
     
    Chungaz, Oct 6, 2017
    #5
  6. Oct 6, 2017 at 1:13 PM
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    Barcared

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    Barcared Well-Known Member

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    This seems to be a thing with NGK iridium. I remember reading about this issue less than a year ago:

    When I had to replace plugs on my car, OEM was NGK so I just did a quick google search before I bought them. There were posts from several vehicle specific forums about lost mpg after NGK. But, for our specific vehicle, people seemed to do well and not have issues with them. Rather they had issues if they went with bosch or Denso plugs. So, I stayed NGK. Ours called for NGK platinum, bot iridium

    NGK iridium does seem to cause some issues in other cars when I was searching for plugs. here are some examples I found when I was researching plugs to out in our car:

    https://ls1tech.com/forums/general-...conomy-after-brand-new-spark-plugs-wires.html
    https://www.civicforums.com/forums/...-mpg-performance-after-spark-plug-change.html

    Maybe check the torque? anti sieze on threads can effect the torque on plugs, can end up over torquing. Maybe that's the issue? maybe back out the thread a little bit? quarter turn maybe, and see what that does?
     
    Barcared, Oct 6, 2017
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  7. Oct 6, 2017 at 1:17 PM
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    Unchained 5150

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    Unchained 5150 Rick

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    This site contains affiliate links for which the site may be compensated.
    Unchained 5150, Oct 6, 2017
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  8. Oct 6, 2017 at 2:15 PM
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    Harry

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    Harry Science, Bitches

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    My gas mileage went way down when I installed installed iridium plugs as well.

    Probably because the plugs came with a supercharger.
     
    Harry, Oct 6, 2017
    #8
    SpoilsofWar, PackCon, irayfz6 and 1 other person like this.
  9. Oct 6, 2017 at 2:39 PM
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    JoefromPTC

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    JoefromPTC Well-Known Member

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    From what folks here have experienced, stock Denso plugs perform the best.
     
    JoefromPTC, Oct 6, 2017
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    DrFunker likes this.
  10. Oct 6, 2017 at 3:04 PM
    #10
    nd4spdbh

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    nd4spdbh Well-Known Member

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    stock denso plugs only!!! There is ZERO need for iridiums in the single vvti 1GR.

    THE ONLY reason they run proper specd iridiums with the supercharger is the fact you have to remove the ENTIRE super charger body to change the driver side bank.... hence they run iridium for the longer change intervals.
     
    nd4spdbh, Oct 6, 2017
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    DrFunker likes this.
  11. Oct 6, 2017 at 3:10 PM
    #11
    taco2010trd

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    taco2010trd Cyber Bully

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    I go with OEM plugs...keep it simple stupid principal
     
    taco2010trd, Oct 6, 2017
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  12. Oct 6, 2017 at 3:39 PM
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    Armed in Utah

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    Armed in Utah Well-Known Member

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    Aren't the IRD's ready to drop in ? No adj ?

    Similar experience......put an IRD in my 700 Rhino......did not improve nuthin'

    Back to the stock NGK's
     
    Armed in Utah, Oct 6, 2017
    #12
  13. Oct 6, 2017 at 7:34 PM
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    badger

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    badger Well-Known Member

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    The ignition system has to be designed for iridium to use them. The Tacoma is not.
     
    badger, Oct 6, 2017
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    knayrb likes this.
  14. Oct 6, 2017 at 7:50 PM
    #14
    Buckwheat893

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    Buckwheat893 Well-Known Member

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    Denso K20HR-U11
     
    Buckwheat893, Oct 6, 2017
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  15. Oct 6, 2017 at 8:02 PM
    #15
    Chungaz

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    Chungaz [OP] Well-Known Member

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    I asked for NGk and that’s what they had in stock. He compared the iridium9 to the lazers and said don’t waste your money on lazers the spec exactly the same other than price. Anyways I’ll be putting in stock Denso plugs this weekend. Anyone with the part # so there’s no confusion. Not sure what others local parts store is like but mine is all young kids.. 18-30
     
    Chungaz, Oct 6, 2017
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  16. Oct 6, 2017 at 8:03 PM
    #16
    Chungaz

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    Chungaz [OP] Well-Known Member

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    Didn’t see last post. Thanks
     
    Chungaz, Oct 6, 2017
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  17. Oct 7, 2017 at 5:16 AM
    #17
    lawrenccar1

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    lawrenccar1 Well-Known Member

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    lawrenccar1, Oct 7, 2017
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  18. Oct 7, 2017 at 11:35 AM
    #18
    topoutman

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    topoutman Well-Known Member

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    topoutman, Oct 7, 2017
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  19. Oct 7, 2017 at 4:15 PM
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    Jimmyh

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    Jimmyh Well-Known Member

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    Some Tacoma's are designed for iridium plugs.

    The 2TR engine comes with iridium plugs from the factory. And it has a transmission dip stick. :)
     
    Jimmyh, Oct 7, 2017
    #19
  20. Oct 8, 2017 at 6:20 AM
    #20
    Jlarso01

    #20
    Jlarso01 Well-Known Member

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    Interesting, when I purchased my used 2015 DCSB 4X4 the plugs had not been changed at 36000 miles.
    I installed NGK iridium LX plugs the first day and they are great. 21 MPG on the highway and great power.
     
    Jlarso01, Oct 8, 2017
    #20
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