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Help new guy diagnose Tacoma

Discussion in 'Technical Chat' started by ShishkaBOMB, Aug 26, 2010.

  1. Aug 26, 2010 at 9:43 AM
    #1
    ShishkaBOMB

    ShishkaBOMB [OP] Well-Known Member

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    Hi all, new guy here just bought a Tacoma.

    1stgen 3.4L Supercharged

    I pulled the plugs (Denso IK22 Iridium) to see if they need to be replaced. From the looks of it i think they might be a sign of a deeper problem.

    The side electrode looks like part of it melted off. And there is clearly oil on the plugs.

    Truck is only running the supercharger with no fuel mods. I also get slight knocking at idle occasionally and on hills.

    What should i do?

    IMG_2849.jpg
    IMG_2851.jpg
     
  2. Aug 26, 2010 at 9:55 AM
    #2
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    Use a higher octane fuel. 91 or better.
     
  3. Aug 26, 2010 at 9:56 AM
    #3
    dman597

    dman597 Well-Known Member

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    Detonation Damage: This plug condition indicates that your engine timing is off and you probably need a tune-up. Another possibility is that the gasoline you're using does not have a high enough octane rating.
     
  4. Aug 26, 2010 at 10:09 AM
    #4
    ShishkaBOMB

    ShishkaBOMB [OP] Well-Known Member

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    I'm running 91 octane and i think the timing is about right because the truck passed smog.
     
  5. Aug 26, 2010 at 10:17 AM
    #5
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    Then you may need a "colder" spark plug, or is it a "hotter" plug. I forget.
     
  6. Aug 26, 2010 at 10:23 AM
    #6
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    I honestly think you are running the wrong plug. You would be better off going back to the dual electrode stock plug. The 3.4 is very picky when it comes to plugs.
     
  7. Aug 26, 2010 at 10:24 AM
    #7
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    I agree with 98tacoma. Looks like you need a colder plug. Also, Your running WAY lean. You need to get more fuel in your CC's...
     
  8. Aug 26, 2010 at 10:25 AM
    #8
    skytower

    skytower Well-Known Member

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    Hitch and wiring, aux back-up light, rear strobe lights, radio and underseat sub.
    Your timing can still be off and pass smog. Running too advanced will make it run hot, detonate, and melt plugs. Using the wrong heat rated plugs will make the ground melt too.
    Check your timing and make sure, or just keep running it with the knock and see what happens;)
     
  9. Aug 26, 2010 at 12:17 PM
    #9
    ShishkaBOMB

    ShishkaBOMB [OP] Well-Known Member

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    Thanks for the replies. What kind of plug should i run?

    Based on this chart:
    http://www.ngk.com/glossaryImages/93.jpg

    I believe oem is Denso 16 (dual electrode) 90919-01192 (K16TR11).

    I am running Denso 22, 2 ranges cooler.
     
  10. Aug 26, 2010 at 12:21 PM
    #10
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    BKR7E-11 gapped at .040
     
  11. Aug 26, 2010 at 12:30 PM
    #11
    ShishkaBOMB

    ShishkaBOMB [OP] Well-Known Member

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    Thanks. The BKR7E-11 appear to be the same as the Denso IK22. 2 ranges cooler than oem and single electrode. Aren't much different?
     
  12. Aug 26, 2010 at 12:30 PM
    #12
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    No...they seem about the same, but alot of people have good results running them.
     
  13. Aug 26, 2010 at 12:34 PM
    #13
    ShishkaBOMB

    ShishkaBOMB [OP] Well-Known Member

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    Thanks, those are not too expensive so i will try them out and see what happens. :D
     
  14. Aug 26, 2010 at 12:45 PM
    #14
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    What fuel mods are you running?
     
  15. Aug 26, 2010 at 2:11 PM
    #15
    ShishkaBOMB

    ShishkaBOMB [OP] Well-Known Member

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    No fuel mods, just supercharger. But after some research, it looks like there is a lot more work involved in getting this thing running right.
     
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