Shuddering issue at certain speeds

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by Noah44, May 17, 2019.

  1. Noah44

    Noah44 New Member

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    Hey guys.
    I have a 2013 Toyota Prius gen3. I had a fuel/air ratio imbalance light come on along with cylinder 4 misfire. I was shuddering pretty violently at 45 mph and about 65 mph on deceleration. Since then I have gotten a tune up and a new O2 sensor. It is not shuddering as bad as before but still shuddering nonetheless. No change in coolant level and my oil isn’t milky. Where should I go from here? I am hoping it is nothing serious I have paid already $600 on this issue. Any input helps!
     
  2. Grit

    Grit Senior Member

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    You should go see the doctor.
     
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  3. Mendel Leisk

    Mendel Leisk 'Orrible Oracle

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    How many miles on it? Ever looked at the EGR system?
     
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  4. The Critic

    The Critic Resident Critic

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    Find a way to test the injector for #3. An injector balance test is one method to try. But on this engine it is probably easier (and quicker) to swap the #3 injector with #4 and see if the fault follows.

    If that does not solve the issue, do a leakdown test on cyl#3.
     
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  5. The Critic

    The Critic Resident Critic

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    An EGR should never cause a single cylinder misfire, especially #3.
     
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  6. Noah44

    Noah44 New Member

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    176k. I actually have never gotten the EGR checked. That’s what everyone’s been saying I should do.
     
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