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Q:

I have a 2003 Hyundai sonata it idles at 2500 RPM what can be wrong with it help on 2003 Hyundai Sonata

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just bought the car and it just started doing it today
(1) Answer
IT COULD BE A LARGE VACCUMN HOSE THAT HAS COME OFF EXCESSIVELY HIGH RPMS ARE CAUSED BY THIS LISTEN TO SEE IF YOU CAN HEAR A SUCKING SOUND