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Shaking in park

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by adam little, Aug 8, 2015.

  1. adam little

    adam little New Member

    Joined:
    May 4, 2015
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    Location:
    Arkansas
    Vehicle:
    2005 Prius
    Model:
    Four
    2005 Prius
    299,999 miles

    Coming home from commute, got off and my exit, and all the sudden it started shaking bad when I slowed down to stop. Stopped in gear or while in park it shakes horribly. Slide in to neutral and you can feel a slight miss or stutter...
    A changed spark plugs.
    Bought one new coil pack and rotated it thru all four, to see if it made a difference on an certain cylinder.... It didn't.

    With the new plugs it's not as bad but I don't know if I should drive it.
    Is there something else I should check or change out?
    Wanted to avoid buying all new coil packs ($85). Unless I had too.

    And info would be appreciated
     
    #1 adam little, Aug 8, 2015
  2. bisco

    bisco cookie crumbler

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    Vehicle:
    2012 Prius Plug-in
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    Plug-in Base
    i would get a mini vci and check for codes. has it had all it's regular maintenance?
     
    #2 bisco, Aug 8, 2015
  3. vskid3

    vskid3 Active Member

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    Cleaning the throttle body is something else you can try.

    Have you tried disconnecting one plug at a time and seeing how it runs?
     
    #3 vskid3, Aug 8, 2015
  4. Aaron Vitolins

    Aaron Vitolins Senior Member

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    Location:
    Franklin TN
    Vehicle:
    Other Hybrid
    Model:
    N/A
    It could also be a fuel injector.
     
    #4 Aaron Vitolins, Aug 9, 2015
  5. adam little

    adam little New Member

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    Location:
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    Vehicle:
    2005 Prius
    Model:
    Four
    Disconnected one coil at a time and it died with every one that was disconnected.

    Yes on the regular maintainance

    I'm getting the codes ran today hioefully
     
    #5 adam little, Aug 9, 2015
  6. bisco

    bisco cookie crumbler

    Joined:
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    2012 Prius Plug-in
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    Plug-in Base
    you gotta get another mile out of her! all the best!(y)
     
    #6 bisco, Aug 9, 2015
  7. Patrick Wong

    Patrick Wong DIY Enthusiast

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    Location:
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    Vehicle:
    2015 Prius
    Model:
    Two
    Since the idle quality is better when the shift selector is in N, I think the problem is more with the hybrid vehicle ECU and less with the engine. MG1 has to rotate at a suitable speed to allow the gasoline engine to idle. If MG1 is fighting the engine, the symptom you've described would occur.

    When the gear selector is in N, the transaxle motor generators are not electrically engaged, so the engine will operate on its own.

    Try disconnecting the 12V battery for a few minutes, then reconnect. The point of that is to allow the ECUs to power down and reboot.
     
    #7 Patrick Wong, Aug 16, 2015
    valde3 and Andyprius1 like this.
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