2004 sonata 4 cyl shudders when idling

whenever im stopped at a stoplight for about 20-25 seconds, the engine will very quickly shudder then return to normal. it almost feels like it going to die but it catches itself and returns to normal. anybody
have an idea? maybe fuel filter?....has 53000 on it
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It sounds like it's time for you to clean the throttle body.

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