Misfire problem

Discussion in 'Hyundai Sonata' started by Arash, Nov 7, 2017.

  1. Arash

    Arash

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    I have a Sonata 2006. The check engine is blinking and the problem is a misfire.
    I did several diagnoses with multiple mechanics, but still did not figure out the problem. The coil is working properly, I bought new sets of coil and spark.
    As we checked more, it seems the problem is that there is no current to the coil from the computer. Mechanically the car works fine. I changed the car ECU but still, the problem did is there. This has been really frustrating for me.
    I even took it to the dealer and they said the problem is the oxygen sensor, I changed it and nothing changed.

    Is there anyone here has an idea what's going on with my car?
     
    Arash, Nov 7, 2017
    #1
  2. Arash

    Arash

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    The codes are P0300, P0303, and P0306
     
    Arash, Nov 7, 2017
    #2
  3. Arash

    avisitor

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    Codes are for a misfire, a misfire on cylinder 3 and 6
    I would try a couple bottles of fuel injector cleaner
    At least it isn't too expensive to try???
     
    avisitor, Nov 7, 2017
    #3
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