Loud thudding sound at idle

Discussion in 'Gen 2 Prius Technical Discussion' started by Banksy, Sep 16, 2020.

Page 2 of 2
  1. Banksy

    Banksy Active Member

    Joined:
    Feb 7, 2020
    415
    132
    0
    Location:
    Lancaster Pennsylvania
    Vehicle:
    2021 Prius Prime
    Model:
    LE
    Alright pulled the plugs

    These things are shot like really bad

    Looks like part of the plug at the bottom broke off

    Should I try to suck out any debris with a vaccine through the plug well?
     

    Attached Files:

    #21 Banksy, Sep 18, 2020
  2. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    111,641
    50,844
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    yes, or remove the head if you can't get it out. or maybe not. a closer look at the pic doesn't look like anything fell off but burned off.
     
    #22 bisco, Sep 18, 2020
  3. Banksy

    Banksy Active Member

    Joined:
    Feb 7, 2020
    415
    132
    0
    Location:
    Lancaster Pennsylvania
    Vehicle:
    2021 Prius Prime
    Model:
    LE

    You think that ceramic burnt off?
     
    #23 Banksy, Sep 18, 2020
  4. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    111,641
    50,844
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    i thought the ceramic was the other end?
     
    #24 bisco, Sep 18, 2020
  5. SFO

    SFO Senior Member

    Joined:
    Feb 7, 2017
    5,302
    4,244
    0
    Location:
    Northern California
    Vehicle:
    2007 Prius
    Model:
    N/A
    Looks like a clean crack from this angle, but that image is deceiving.

    You could save some time with a cheap borescope, some are under $20.
     
    #25 SFO, Sep 18, 2020
    Raytheeagle, jerrymildred and bisco like this.
  6. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    111,641
    50,844
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    ah, i see it now
     
    #26 bisco, Sep 18, 2020
  7. jerrymildred

    jerrymildred Senior Member

    Joined:
    Oct 28, 2016
    11,517
    14,135
    0
    Location:
    Tampa, FL
    Vehicle:
    2017 Prius
    Model:
    Two
    I don't have a borescope yet. Oddly enough, I've never needed one. But if I pulled out a spark plug that looked like that, I'd be out buying a borescope right away. It may be that the broken off ceramic has already been beat to dust and done all the cylinder wall damage it's going to do, but I would want to be sure before running it again.
     
    #27 jerrymildred, Sep 18, 2020
  8. dolj

    dolj Senior Member

    Joined:
    May 14, 2012
    8,125
    4,138
    0
    Location:
    Wellington, New Zealand
    Vehicle:
    2007 Prius
    Model:
    N/A
    Is the Iridium disc still attached to the electrode (underside - can't see in the image)?
     
    #28 dolj, Sep 19, 2020
  9. Banksy

    Banksy Active Member

    Joined:
    Feb 7, 2020
    415
    132
    0
    Location:
    Lancaster Pennsylvania
    Vehicle:
    2021 Prius Prime
    Model:
    LE
    Here is a picture of inside via a bit scope

    Definitely something in there

    Tried to get a chop stick in there to see if it was loose or embedded

    Definitely not embedded


    Perhaps some grease on the end of a chopstick to fish it out?
     

    Attached Files:

    #29 Banksy, Sep 21, 2020
  10. SFO

    SFO Senior Member

    Joined:
    Feb 7, 2017
    5,302
    4,244
    0
    Location:
    Northern California
    Vehicle:
    2007 Prius
    Model:
    N/A
    That piece doesn't look that big. Would give the old greasy stick trick a shot, wonder if vaseline is sticky enough.

    Might try hooking up a smaller diameter plastic/rubber hose or a larger diameter straw (with an angle cut tip) to a vacuum.

    They offer straws in metal, glass, silicon, plastic, and bamboo. If using the metal variety you could fish it out with a magnet if needed.

    Some can be quite long, others end around 8.5".

    [​IMG]

    They make mini / micro vacuum attachments, which could be an option as well if not to large in diameter.

    [​IMG]
     
    #30 SFO, Sep 21, 2020
  11. Banksy

    Banksy Active Member

    Joined:
    Feb 7, 2020
    415
    132
    0
    Location:
    Lancaster Pennsylvania
    Vehicle:
    2021 Prius Prime
    Model:
    LE
    Alright sucked out the broken piece with a vacuum and piece of fuel line

    Changed plugs and coils


    Works awesome


    Thanks for the help!

    Would anyone recommend a brand of coils for the future? I got these off Amazon in a pinch because oem coils at auto zone were like 95 each

    Any solid offerings that'll work well long term in the future?
     
    #31 Banksy, Oct 1, 2020
    SFO likes this.
  12. mr_guy_mann

    mr_guy_mann Senior Member

    Joined:
    Sep 3, 2020
    3,926
    1,889
    0
    Location:
    NJ-USA
    Vehicle:
    2006 Prius
    Model:
    Four
    Glad you got it fixed. If I want to replace a part once and be done then it's OEM or Denso (which makes alot of parts for OEM).

    Posted via the PriusChat mobile app.
     
    #32 mr_guy_mann, Oct 1, 2020
(You must log in or sign up to post here.)
Page 2 of 2