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  • 3.9 spark plugs

    Hey guys. I remember reading somewhere that the spark plugs on the 3.9 are designed to last up to 100k. But i've been noticing my performance decreasing over time. I'm up to 67k right now on the stock plugs and just wondering when you guys have changed yours and whatnot?

    '06 Malibu SS...Vector 93 tune, Nitto Invo, Magnaflow, Cai

  • #2
    Re: 3.9 spark plugs

    have you pulled one out to look at it? It might not be you plugs

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    • #3
      Re: 3.9 spark plugs

      no i havent pulled any of the six out

      i've always had 60* v6's and i know they love new ac delcos but was wondering whats the recommended on often to change them just for good performance and gas mileage

      '06 Malibu SS...Vector 93 tune, Nitto Invo, Magnaflow, Cai

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      • #4
        Re: 3.9 spark plugs

        i have already changed my plugs and wires, it has made a difference.

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        • #5
          Re: 3.9 spark plugs

          Originally posted by wingerakj7
          i have already changed my plugs and wires, it has made a difference.
          at what mileage?

          G6 - 240sx - Lancer - 325is - WRX

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          • #6
            Re: 3.9 spark plugs

            Originally posted by mike91y2k
            Originally posted by wingerakj7
            i have already changed my plugs and wires, it has made a difference.
            at what mileage?
            x2

            '06 Malibu SS...Vector 93 tune, Nitto Invo, Magnaflow, Cai

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            • #7
              Re: 3.9 spark plugs

              Funny, I read this post earlier today and when driving to work, I was wondering I had a cylinder not firing or something. Real lull in power and about sudden drop in rpm after I pegged the gas a little. Was thinking sparks plugs could be one of the few possibility's?I'm at 80K though, just hit it last week .
              2006 FOM GTP 6MT
              Current Mods:Racingline Strut Bar/Motor Mounts, Injen Clone CAI,KYB Struts,
              10" Solobaric L7, 2200 watt Power Akoustic Amp, 5 farad Cap, 3000k HID Fogs, r1 Premium Rotors/Ceramic pads,Redline Tunning QUICKLIFTS, 'HDGDS' Lip,All debaged except GTP, all black arrowhead overlays, eyebrow overlays.

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