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Stumble only when hot

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    Stumble only when hot

    My IX starts fine and runs fine under most situations, but after it gets hot it has a stumble. On the highway it feels like it just catches... like a slight hesitation for a second before smoothing out. When in stop and go traffic, it sputters a second or two before reving up some and going back to normal.

    My commute to work is short, like 15 minutes. In those drives, it is fine. On days when I hit a ton of traffic and hit has been sitting in traffic for 30-45 minutes, the problem appears.

    Any guesses? What does a failing catalytic converter cause? Sometimes it feels like the problem is not in the engine, but further down the line.
    Last edited by dubdub; 06-15-2016, 03:02 PM.
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