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Revvng engine - help

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by Patela2oh, May 14, 2019.

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  1. Patela2oh

    Patela2oh Junior Member

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    2012 Prius iii with 146k miles always lovingly taken care of. Over the last month I’ve noticed that if i have to step on the gas (merging on highway, crossing traffic) there is a pause, feels like less power than usual and the ice engine runs / revs for 4-5 seconds at the same rate after i have let off the gas. I normally run on eco but with ac on as I’m in south Florida. On power , normal , ac off same issue
     
    #1 Patela2oh, May 14, 2019
  2. Patela2oh

    Patela2oh Junior Member

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    Thanks in advance.
     
    #2 Patela2oh, May 14, 2019
  3. Rebound

    Rebound Senior Member

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    Ouch. I don’t have the definite answer to that. I would begin by attaching an OBD diagnostic tool to look for failure codes, such as cylinder misfire. It could be a bad coil or spark plug on one cylinder, but it’s not possible to say without some diagnostic info.
     
    #3 Rebound, May 14, 2019
  4. The Critic

    The Critic Resident Critic

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    I have had this happen several times. No resolution was ever found. I think it is related to the temp of the HV Battery Pack since the HV temp was always high when it happened for me.
     
    #4 The Critic, May 14, 2019
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  5. Patela2oh

    Patela2oh Junior Member

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    I’ll take it into service... just wanted to make sure i wasn’t going to blow up the car ;-)

    Other than that when it’s at speed it’s fine, ac is cold, no noises or shakes... mph is down 7-10%
     
    #5 Patela2oh, May 14, 2019
  6. Patela2oh

    Patela2oh Junior Member

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    Mpg not mph
     
    #6 Patela2oh, May 14, 2019
  7. tankyuong

    tankyuong Senior Member

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    Chech the 12v battery
     
    #7 tankyuong, May 14, 2019
  8. Patela2oh

    Patela2oh Junior Member

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    What happens when the 12v battery starts to die?

    It’s probably due to be replaced
     
    #8 Patela2oh, May 14, 2019
  9. Mendel Leisk

    Mendel Leisk Senior Member

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    Check throttle body, maybe needs cleaning.

    Dare I ask: did that include Exhaust Gas Recirculation circuit and intake manifold cleaning. It should be well along towards clogged by now.
     
    #9 Mendel Leisk, May 14, 2019
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