Engine coils replaced and spark plugs driving and stops running

Discussion in 'Prime Main Forum (2017-2022)' started by Joe Wall, Sep 18, 2025 at 1:16 PM.

  1. Joe Wall

    Joe Wall Member

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    I took my prius in and the engine coil 1 was out. Replaced all coils and spark pulls. Mom took it home and stopped again while driving. It wont accelerate once driving. Any advice? Could it be one of the batteries?
     
  2. Brian1954

    Brian1954 Senior Member

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  3. BiomedO1

    BiomedO1 Senior Member

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    A man gotta know their limitations. You did your best and now it's time to take it to a professional for a proper diagnosis and fix, or you could just keep throwing parts at it. Did you put in cheap counterfeit parts? Is the problem still there because you put in bad parts or was the original parts fine and that wasn't the problem to begin with? This is why you test first - before replacing random parts......
    It's your money and your car; how soon do you need it running reliability?

    YMMV
     
  4. Joe Wall

    Joe Wall Member

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    I took it into a mechanic and paid $1400. I didn't do any of it. He will diagnose but just curious what's going on
     
  5. Joe Wall

    Joe Wall Member

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    He said it was done and driving it home went out
     
  6. BiomedO1

    BiomedO1 Senior Member

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    Apparently NOT a very good mechanic; sorry that happened to you. Seems like he's just throwing parts at problems too and NOT doing any REAL testing - otherwise your problem would be fixed!!!! $1400 for plugs and coils seem excessive; was that a dealer that did the work???
    What were the error codes he got? Did he check the fuel system pressure? What was it? Did he give you the old "defective" parts?
    That's the difference between a good honest mechanic and a shyster that only wants what's in you wallet. Take it to a good honest mechanic that other people trust and has excellent ratings on other platforms - preferably a Prius specific specialist.
    The more detailed and accurate the information you provide - the better we can help you. If you give us generic inaccurate observations - your going to get generic or wrong answers from us - We only have whatever you type here. We can't see, hear, or smell your problem. Sorry, that's how it is.....

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    #6 BiomedO1, Sep 18, 2025 at 7:36 PM
    Last edited: Sep 18, 2025 at 8:12 PM