I had that problem. Take off your plastic engine cover and examine the spark plug wires. I guess that animals like to make nests in between the cover and the engine. A mouse chewed just enough of one spark plug wire to cause a bad hesitation rather regularly. Good luck!
Needs a tune up you are burning too rich, too much gas in the carburetor.
The 2001 Kia Rio is a gas-powered vehicle.
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The 2014 Kia Sedona is a gas-powered vehicle.
The 2009 Kia Sedona is a gas-powered vehicle.
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The 2004 Kia Sedona is a gas-powered vehicle.