2004 Hyundai Sonata – experiences skip highway speeds

Dear Doctor: My wife’s 2004 Hyundai Sonata (144,000 miles) occasionally experiences a skip at highway speeds — a half second where it seems to lose power but then returns to normal. Typically this will occur after driving two to three hours, but at times will happen at shorter driving intervals. It will happen a few times and then go away after decelerating and then returning to speed. Is this some sort of timing issue? Jeff

Dear Jeff: This is not a timing issue. You need to have a close look at the ignition system, including spark plugs coils and plug wires. I always use the factory parts on these cars, as they fit and are priced right. Note: You do have to make sure the timing belt was replaced at the correct maintenance interval.

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