Slight engine vibration

Discussion in 'Gen 4 Prius Main Forum' started by shadow4478, Sep 13, 2017.

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  1. shadow4478

    shadow4478 New Member

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    Today at a red light sitting with everything off the engine gave off slight vibration best way to describe it is as if the cylinder misfired the vibration was strong enough to feel it at steering wheel and the driver seat. It did this at 2 different stop lights.
    2017 with 4000km on it

     
  2. RCO

    RCO Senior Member

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    Sorry to hear that, can you tell us a little more about the circumstances please? Like weather conditions at the time, what your in car settings were, etc.
     
  3. shadow4478

    shadow4478 New Member

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    Weather was about 20c
    Ac was on manual at 19c
    Set to eco mode
    Not sure what other setting you might need
     
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  4. RCO

    RCO Senior Member

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    That's fine did you have the headlights on, because I'm not sure why the engine was running at the lights?
    I'm guessing here, but if you had not got far from home and throttle called for engine power it might run on to warm up the cat converter. Then, as it was reaching the optimum exhaust temp and shutting down, the hybrid battery could have called for a recharge a split second later. Do to see what I'm getting at?
     
  5. ExMachina08

    ExMachina08 Junior Member

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    Sounds to me like it could be two different things. If you are coming off a long recharge you could potentially have over charged the battery and the Prius will then spin the engine to burn off the excess charge which could make some vibration. The other more likely option is that your car could have been doing the "idle dance" where it idles to set the ECU settings. This is normal and will happen occasionally even after the car is warmed up. I notice that my Gen 4 does have some slight vibration when it is idling at a stop and I feel it in the steering wheel and in the brake pedal.
     
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  6. bisco

    bisco cookie crumbler

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    were you in the warm up cycle?
     
  7. robsnyder20

    robsnyder20 Active Member

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    Mine does this occasionally as the engine runs and then shuts off because of battery being full.