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"Jittery" Feeling When Creeping Forward

Discussion in 'Gen 3 Prius Technical Discussion' started by corystal, Dec 28, 2023.

  1. corystal

    corystal Junior Member

    Joined:
    Oct 21, 2012
    40
    12
    5
    Location:
    Los Angeles
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Advanced
    When on the brakes, but not enough to stop, and the car is creeping forward with only electric motors, it feels almost like the motors are stepper motors... the movement is jittery for lack of a better word. It's a consistent 280BPM or so. Once the brakes are on... or the car is doing past a fewMPH there's no trace of it.

    Anybody have this before?
     
    #1 corystal, Dec 28, 2023
  2. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    108,733
    49,408
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    rusty rotors maybe. mine had always done that, like they're grabbing and releasing quickly
     
    #2 bisco, Dec 28, 2023
  3. Mendel Leisk

    Mendel Leisk Senior Member

    Joined:
    Oct 17, 2010
    55,463
    38,672
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    If I for example roll forward into the garage under electric-propulsion only (plain 2010), it feels a little"granular", almost like the wheels have about 50 faces, instead of being round. I suspect it's just how the motors work. Only notice when it's real quiet, on a smooth slab.
     
    #3 Mendel Leisk, Dec 28, 2023
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