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Engine prolongs shutting down when going to EV Mode

Discussion in 'Gen 2 Prius Main Forum' started by HipHapa, Mar 10, 2010.

  1. HipHapa

    HipHapa New Member

    Joined:
    Jan 28, 2010
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    Location:
    SoCal
    Vehicle:
    2005 Prius
    Model:
    N/A
    I bought a used Prius just over a month ago with about 60k miles on it. I noticed that at times, when the car is switching from engine to EV mode, it's not smooth and sometimes engine hesitates when shutting down. Is this something I should be concerned about? Is this normal?
     
    #1 HipHapa, Mar 10, 2010
  2. cwerdna

    cwerdna Senior Member

    Joined:
    Sep 4, 2005
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    Location:
    SF Bay Area, CA
    Vehicle:
    2006 Prius
    You might find the PDF at http://priuschat.com/forums/attachm...improvement-priusstagemodereference051408.pdf from the thread http://priuschat.com/forums/gen-ii-...angauge-best-threads-mileage-improvement.html to be helpful. The rough shutdown can definitely happen and isn't abnormal.

    As for hesitates, if the ICE (internal combustion engine) is past the warmup phase but not hot enough (FWT Fahrenheit Water Temperature aka Coolant Temperature) is <=145 F and you have the heat on (with fan on), the ICE may run when driving at low speeds (<42 mph) or when stopped. Next time, for fun, when the ICE is pretty cold, try turning the heat up and the fan on/off. You'll see the ICE turn on/off with it.
     
    #2 cwerdna, Mar 11, 2010
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