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Do you recommend a fuel system cleaning or timing belt change at 99K miles?

The Accent engine uses a timing chain which doesn't need replacing. There is a serpentine belt that drives the water pump and alternator. You might want to change that if it's frayed or missing chunks.

For fuel system cleaning, Hyundai has a cleaner that they recommend. Not sure what it is.. Perhaps someone here can help.

And.. For a PCM flash, you'll need to drop by a Hyundai dealer.
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