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Old > New ?

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by Greenteapri, Dec 5, 2021.

  1. Greenteapri

    Greenteapri Active Member

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    After my successful rear shock replacement, I threw some ominous codes. Dr. Came back with a P0301. Wth. Cleared and ran some errands. While out, at idle, she was doing the Texas Rattlesnake under the hood. Drove home with my seat and face as close to the dash like the gf; heard a few more rattles mostly at lower speeds with ICE on. Threw another code, this time P0303.

    Pulled the plugs.
    Screenshot_20211205-141749_Gallery.jpg
    Screenshot_20211205-141741_Gallery.jpg
    Screenshot_20211205-141705_Gallery.jpg Screenshot_20211205-141615_Gallery.jpg

    Left: ~20k
    Right: ~98k

    Reinstalled the old plugs. So far, no codes or rattlesnakes under the hood.
     
    #1 Greenteapri, Dec 5, 2021
  2. JC91006

    JC91006 Senior Member

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    I don't get it. You must have missed some details. You replaced shocks, and you got a misfire. but then you reinstalled old plugs??? from?
     
    #2 JC91006, Dec 5, 2021
  3. ASRDogman

    ASRDogman Senior Member

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    I hope you cleaned the plugs before re-installing them?
    They don't look good though. Where are you getting your fuel?
     
    #3 ASRDogman, Dec 5, 2021
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  4. bisco

    bisco cookie crumbler

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    you replaced the shocks and got a code? (n)
     
    #4 bisco, Dec 5, 2021
  5. Greenteapri

    Greenteapri Active Member

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    Two separate events happening simultaneously.

    Fixed one problem and another popped up.

    Yes, they were cleaned. I use Chevron 99.9%.

    Yes, weird. o_O
     
    #5 Greenteapri, Dec 5, 2021
  6. bisco

    bisco cookie crumbler

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    perhaps the new(er) plugs are counterfeits
     
    #6 bisco, Dec 6, 2021
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  7. mr_guy_mann

    mr_guy_mann Senior Member

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    The plug on the left has a lot more deposits on it (some oil on the center insulator?) The center electrode also has noticably more wear. If it's 20k on it, I'm thinking counterfeit. Where did you purchase them?

    Posted via the PriusChat mobile app.
     
    #7 mr_guy_mann, Dec 6, 2021
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  8. rjparker

    rjparker Tu Humilde Sirviente

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    I call this a "Shock and Awe" video. Texas Rattlesnakes don't shake as much but it is certainly an interesting analogy.
     
    #8 rjparker, Dec 6, 2021
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  9. Leadfoot J. McCoalroller

    Leadfoot J. McCoalroller Senior Member

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    Screen Shot 2021-12-06 at 2.55.38 PM.png
     
    #9 Leadfoot J. McCoalroller, Dec 6, 2021
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  10. Greenteapri

    Greenteapri Active Member

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    At a Toyota dealership. My money is on counterfeit.

    Lots of fakes out here.

    Picked up some new plugs today.
    20211206_185525.jpg

    Packaging (two years apart)

    20211206_185817.jpg

    New/Old vs. New New
     
    #10 Greenteapri, Dec 6, 2021
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  11. Greenteapri

    Greenteapri Active Member

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    *Update*

    No CEL's or rattlesnakes with the old sparkies.

    2+ MPG boost.
     
    #11 Greenteapri, Dec 7, 2021
  12. bisco

    bisco cookie crumbler

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    i haven't read of any counterfeits from dealerships, they have a tighter supply chain. but anything is possible
     
    #12 bisco, Dec 7, 2021
  13. Greenteapri

    Greenteapri Active Member

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    **Update**

    3+ MPG Boost.

    No rattlesnakes or CEL's.
     
    #13 Greenteapri, Dec 9, 2021
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  14. OptimusPriustus

    OptimusPriustus Active Member

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    Well possible. Has happened even in medicine industry. Unfortunately we gonna see more and more of this. Risk vs. reward way too good.
     
    #14 OptimusPriustus, Dec 12, 2021
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