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2003 Hyundai Tiburon Question: My cylinders 1,3, and 5 are misfiring, what could cause this?

 

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Kraby88, 2.7L V6, Henryville, PA, July 01, 2014, 16:54
 Rookie

I'm driving along on the highway, I go to accelerate and my cars bogs out, completely stops at 4k rpms, can't push any further past it, I let off the gas, at this point my motor sounds like a go-cart engine, I push the gas again same problem...a test shows my oxygen sensors malfunctioning, cylinders 1,3, and 5 misfiring and a random misfire, what could cause all of 1 side to misfire?

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  • Answer #1

    July 01, 2014, 17:39
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     Master

    Have exhaust flow checked. Possible failed cat. converter.

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    Kraby88, July 01, 2014, 17:46
     Rookie

    I only have 1 Cat. converter, could that still be the issue?

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  • Answer #2

    July 01, 2014, 17:39
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     Master

    Have exhaust flow checked. Possible failed cat. converter.

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  • Answer #3

    July 01, 2014, 18:42
     Journeyman

    It's not the Cat. If that engine has cam position sensors for each bank you may have one going bad.

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    Kraby88, July 01, 2014, 19:10
     Rookie

    wouldn't that set off a different code though?

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    DonziGT230, July 01, 2014, 19:51
     Journeyman

    Not necessarily. If the input side of the sensor is ok the computer can't tell it's bad, it sees the result which is the misfires. The CPS is just a guess mind you. I can't think of anything else that would only affect one bank, but I don't know that particular engine.
    If it's always running bad it could be that the timing belt jumped, but it sounds like it's an occasional issue.

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    DonziGT230, July 01, 2014, 19:51
     Journeyman

    Not necessarily. If the input side of the sensor is ok the computer can't tell it's bad, it sees the result which is the misfires. The CPS is just a guess mind you. I can't think of anything else that would only affect one bank, but I don't know that particular engine.
    If it's always running bad it could be that the timing belt jumped, but it sounds like it's an occasional issue.

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  • Answer #4

    July 01, 2014, 18:42
     Journeyman

    It's not the Cat. If that engine has cam position sensors for each bank you may have one going bad.

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