2004 Hyundai sonata it will not stay running you turn the key and it seems like you got to keep pumping the gas pedal

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I have a 2004 Hyundai sonata it started it started bogging down RPMs dropping it would not keep power losing power so I parked it it's been parked for 4 years I tried to crank it over and now it's to where it would start now it's gotten to the point to where it won't stay started like you turn the key and it wants to kick on but you got to keep pumping gas and it keeps making a popping sound