How to change your sparkplugs - Page 2
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This is a discussion on How to change your sparkplugs within the Maintenance, service, and repair forums, part of the Tutorials & DIY category; With everything out of the way, we'll now have access to the passenger side coil packs- they come out the ...

  1. #16
    Moderating on the run! Big Sky WRX's Avatar
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    With everything out of the way, we'll now have access to the passenger side coil packs- they come out the same way as before:
    Attached Thumbnails Attached Thumbnails coilpackspassengr.jpg  

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  3. #17
    Moderating on the run! Big Sky WRX's Avatar
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    The only difference on this side is there is a bracket that is attached to the coil pack closest to the fire wall- simply remove it (make sure to reinstall when putting the coilpack together).

  4. #18
    Registered User AjIsDope's Avatar
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    Very nice writeup BS.

    What model NGK plugs did you use?

    How often do you change your plugs when running higher boost?
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  5. #19
    Moderating on the run! Big Sky WRX's Avatar
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    pic of bracket:
    Attached Thumbnails Attached Thumbnails coilpackbracket.jpg  

  6. #20
    Moderating on the run! Big Sky WRX's Avatar
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    Reinstall all the pieces you have removed. Hooking up the battery last.

    Check your spark plugs for unusual color- lot's of good sites explaining the different colors and conditions.

    You have effectively reset your ECU by disconnecting your battery, which means the Advanced Multiplier (AM) is set back to 8, you want it to get to 16. You can do this quicly by gently driving (no boost) until you have a place you can get into 3rd gear- accelaerate slowly, left foot braking (puts load on) keep boost at ~ 2-3 psi for ~ 20-30 secs and it should be there. Ofcourse if you have a Delta Dash, you can tell for sure.

    Happy driving.

    Big Sky
    Last edited by Big Sky WRX; 12-20-2003 at 03:30 PM.

  7. #21
    Moderating on the run! Big Sky WRX's Avatar
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    Originally posted by AjIsDope
    Very nice writeup BS.

    What model NGK plugs did you use?

    How often do you change your plugs when running higher boost?
    I'm using the copper, one step colder- part # BKR7ES-11. They come gapped at ~ .043 so you have some closing up to do.

    I change plugs every 12,000 miles. Platinum's can go longer.

    Big Sky

  8. #22
    Registered User AjIsDope's Avatar
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    Great - thanks. I'm just about there, so this may come in handy soon.

    Do you still gap them to the stock gap even when running higher boost?

  9. #23
    Moderating on the run! Big Sky WRX's Avatar
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    Originally posted by AjIsDope
    Great - thanks. I'm just about there, so this may come in handy soon.

    Do you still gap them to the stock gap even when running higher boost?
    Better to go the low end- I go .028, some go lower even .026.

    Big Sky

  10. #24
    Registered User AjIsDope's Avatar
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    Gotcha. That way, you know your car will be burning the air/fuel much more efficiently since the time for the spark to go from the electrode to the "elbow" of the plug will be much shorter. Makes sense.

  11. #25
    Registered User MidnightFLAT4's Avatar
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    Originally posted by Big Sky WRX
    I'm using the copper, one step colder- part # BKR7ES-11. They come gapped at ~ .043 so you have some closing up to do.

    I change plugs every 12,000 miles. Platinum's can go longer.

    Big Sky
    12k miles!!!! subaru says 60k (platinum)
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  12. #26
    Registered User AjIsDope's Avatar
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    Originally posted by MidnightFLAT4
    12k miles!!!! subaru says 60k (platinum)
    But if you are running higher boost than stock, they will wear faster.

  13. #27
    Moderating on the run! Big Sky WRX's Avatar
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    A lot of guys are changing copper plugs at 3,000 miles. I tend to change things quite a bit earlier than most of the reccomended intervals- rotate tires every oil change, oil change at 3000 miles, swap tranny/diff fluid at 12,000, fuel filter 24,000, bleed brakes several times a year, change coolant every year, etc- then again my car is driven more spiritedly than most.

  14. #28
    Registered User MidnightFLAT4's Avatar
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    oh man i dont wanna spend more money on maintainance...
    Im stock boosted now, but as soon as accessport comes... its looks like NGK platinum time

    So is it cheaper to go get those special tools, or have a professional do it

    Also, is there an advantage to copper plugs?

    looks like ill need a fuel filter before i get accessport
    03 MBP WRX Sedan
    STi RA gearset October 4th,STi Trans Mount
    Cobb AccessECU STG II 16.4psi. Bosal DP, Catless OEM UP, 205/55 ZR16 Futura Ultra Z's.

  15. #29
    Registered User AjIsDope's Avatar
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    You should probably be able to do it with a flexible u-joint socket. You definately need a spark plug gapper.

    Cost = $2

    Gapper = $1

  16. #30
    Moderating on the run! Big Sky WRX's Avatar
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    Good tools are an investment. You'll save mucho $ over the long haul, the satisfaction of doing it yourself and you'll find nobody cares about your car like you do.

    Copper plugs probably offer a little more spark when new, but they wear out quicker (cheaper too). Guys who are checking their plugs frequently run copper ones. I'm probably going back to a platinum plug.

    Big Sky

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