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after clean up fuel injectors, EGR, intake manifold, engine shaking

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by tamo3, Sep 21, 2024 at 12:35 PM.

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  1. tamo3

    tamo3 Junior Member

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    Thanks @Leadfoot J. McCoalroller !
    After swap back to original set, engine vibration is gone!!!!



    Thanks all for your help! You guys are the best!
    I will order them to Rock Auto now.
     
    #21 tamo3, Sep 21, 2024 at 4:32 PM
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  2. Tombukt2

    Tombukt2 Senior Member

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    Well thank God for small favors.
     
    #22 Tombukt2, Sep 21, 2024 at 4:40 PM
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  3. tamo3

    tamo3 Junior Member

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    ordered DENSO 3444 (SC20HR11) at Rockauto.com
    total $43.56

    eBay fake set was $16.58....
     
    #23 tamo3, Sep 21, 2024 at 4:42 PM
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  4. Mendel Leisk

    Mendel Leisk Senior Member

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    SC20HR11 will be fine, but fwiw Toyota has gone to a slightly hotter plug: SC16HR11. If it too late to revise order I wouldn't sweat it; SC20HR11 did just fine in ours, for the the first 12 years.

    Here's a rotated crop from one of your pics:

    upload_2024-9-21_16-20-51.png

    ^ Assume the "old" plug on left, "new" on the right?

    ^ update: new plugs on left, old on right.

    And good you've got the EGR cleaned. (y)
     
    #24 Mendel Leisk, Sep 21, 2024 at 7:20 PM
    Last edited: Sep 22, 2024 at 7:05 AM
  5. Tombukt2

    Tombukt2 Senior Member

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    I was wondering about that I used to run the colder plugs and hotter setups but I can't imagine a Prius would be considered a hot setup engine wise so the 16s would stay I would hope. That's what I use the 16s and all of the Prius as far as I know.
     
    #25 Tombukt2, Sep 21, 2024 at 7:37 PM
  6. xliderider

    xliderider Senior Member

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    Geez, $16... that was definitely a too good to be true/real price.

    I hope you left a negative review and called out the seller for selling counterfeit parts.

    SM-G781V ?
     
    #26 xliderider, Sep 21, 2024 at 7:44 PM
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  7. tamo3

    tamo3 Junior Member

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    Actually, the left side is a new fake plug and the right side is the original old plug.
    I did not know SC16HR11. Already ordered SC20HR11.

     
    #27 tamo3, Sep 21, 2024 at 11:28 PM
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  8. xliderider

    xliderider Senior Member

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    The fake plugs have a totally different shape on the ground electrodes. The original plugs have ground electrodes with 90 degree "corners', whereas the fake ones have rounded corners.

    Denso has information on their tapered ground electrode in this link. You can see the shape of the ground electrodes in the illustrations match your original plugs:

    SPARK PLUG Construction | Basic Knowledge | SPARK PLUG | Automotive Service Parts and Accessories | DENSO Global Website

    SM-G781V ?
     
    #28 xliderider, Sep 22, 2024 at 1:49 AM
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  9. Tombukt2

    Tombukt2 Senior Member

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    The 16 heat range has been the gold standard of the heat range for Toyota since Good Lord 1971 I believe. Sometimes for extended wide open throttle operation racing things like that people will use a step cold or plug for those kind of extended high rev running conditions I used to run the ZU plugs the fine wire platinum's way back in the day before iridium and all that we're talking in the early '80s those plugs would last 4000 miles and be destroyed that was a high revving 4T GTE turbo engine that was in a 1982 Celica Paris Dakkar rally setup.
     
    #29 Tombukt2, Sep 22, 2024 at 7:28 AM
  10. tamo3

    tamo3 Junior Member

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    New Spark Plug arrived from RockAuto.

    Package is totally different fromeBay fake one.
    left side is new one from RockAuto. Right side is from eBay fake one
     

    Attached Files:

    #30 tamo3, Sep 25, 2024 at 5:01 PM
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  11. Tombukt2

    Tombukt2 Senior Member

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    Now if they were SC or SK16 you'd have the factory heat range but a 20s not going to hurt you not in the Prius you're not doing anything with that engine anyway You're lucky that it's running not leaking and burning oil which may not be for very long
     
    #31 Tombukt2, Sep 25, 2024 at 5:42 PM
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