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Thread: E3 diamondfire sparkplugs

  1. #1
    Senior Member 91GMCJimmy's Avatar
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    E3 diamondfire sparkplugs

    anyone used these plugs yet they any good?

  2. #2
    Zombie Killer 6SpeedBlazer's Avatar
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    waste of money

  3. #3
    LQ4/LS1 Turner's Avatar
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    got them in the blazer, picked up 1 mpg, not a waste of money. thread closed. lol

  4. #4
    Registered User wagonmaster's Avatar
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    Quote Originally Posted by Turner View Post
    got them in the blazer, picked up 1 mpg, not a waste of money. thread closed. lol
    You could have picked up that 1 mpg just because you put in new plugs.

    Personally, I find it hard to believe a spark plug will really make that much difference, except to your wallet.

  5. #5
    Zombie Killer 6SpeedBlazer's Avatar
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    Quote Originally Posted by Turner View Post
    got them in the blazer, picked up 1 mpg, not a waste of money. thread closed. lol
    you gained 1mpg because your wallet was lighter.

  6. #6
    low and all show timmah's Avatar
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    you're better off staying with the ac delco plugs from what i've read
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  7. #7
    LQ4/LS1 Turner's Avatar
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    think what you like, old plugs, wires, cap and rotor had 5000 km on them. you will NEVER find a single part on my vehicles that are overdue or worn out. e3 plugs have been proven on a engine dyno to pick up around 6 horse on the top end with 400ish horse v8, plus use less fuel. ill gain 1 mpg, you can stick with old technology :)

  8. #8
    AIR RIDE EQUIPPED DavesterJr's Avatar
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    I thought about trying the E3 plugs, but I couldn't find enough people that supported using them.I went back with AC Delco.

  9. #9
    Registered User 89Blaz's Avatar
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    I used them once in a Dodge V8 had 4 of them go bad from manufacture defect never again.

  10. #10
    Registered User suncad03's Avatar
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    i run stock ac delco platinum or what ever came stock, the engine was built for them plugs and they are good for 100k i tryed the bosh platinum 4 when they first came out on my car because they were all the hipe lol car ran worse and the end broke off one plug 2 weeks later and was stuck in the top of my piston, not everything is as good as they advertise.

  11. #11
    5.7L VORTEC 350 blazin4low's Avatar
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    I HAD them and never again. At first I liked them, and it felt better, but that is with any new plug, then I was getting a random misfire. Turned out the almighty horsepower gaining e3's would heat up and the electrode would move to the side and cause the misfire.

    I also found out the e3's are just a normal copper plug with 3 ground points and have to be replaced after 15-30,000 miles and they cost as much as iridium plugs :nono:

    I put NGK platinum plugs in for half the price as the e3's and the blazer runs better.

    and for everyone's information of the day NGK makes AC Delco plugs

    anyone see a problem between to two plugs???? and they were installed at the same time
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  12. #12
    Senior Member 91GMCJimmy's Avatar
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    so the bosch platinum 4 suck too then?

  13. #13
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    ac delco platinum professional ftmfw!!!!!11 Duh, winning.


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  14. #14
    Registered User Crucified's Avatar
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    Quote Originally Posted by 6SpeedBlazer View Post
    you gained 1mpg because your wallet was lighter.

    :rofl:
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  15. #15
    LQ4/LS1 Turner's Avatar
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    you should put in what the manufacture calls for as that is what the engine is designed to work best with, people who buy the most expensive platinum or iridium plug thinking they are doing better are doing worse, same with using higher octane gas in your normal street car. i just put in my 2 cents, not every will get the same results as i also have a bunch of other things done to my truck as well.

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