Rough idle Runs rough at idle and low speed.

SOURCE: runs & idles rough has no power when cold gets better when warm

Spluttering and missing is usually one of two things Fuel or spark ?
Fuel problems will be traced to 1/ in line fuel filters .. 2/ tank run low on petrol throwing dirt and grit into tank filter ( if Fitted ) and blocked or restricted injectors a good fuel additve sometimes cures that problem , but replacement is a far better option .
Poor spark plugs breaking down under preassure oiled plugs due to overfilling or incorrect fuel mixtures .. poor or cracked distributor caps dirty or damaged rotor arms in said cap .. leaking HT leads damaged by rubbing and contact with hot engine causing sparks to fly to nearest earth disrupting the spark and ignition timing ... hope this helps Regards vortash

SOURCE: 2002 Kia Rio runs rough when idling

well spend some change and have a simple tune-up.  Plugs and filters and readjust the idle.

SOURCE: running rough

Take out your plugs, if they are oiled up, the seals on your valves may need replacing as the oil will leak through into your cylinders

SOURCE: 2002 kia sedona 3.5l has rough idle replaced plugs wires and coil

this vehicle has coil packs for the ignition correct? have you ran the engine at night with all surrounding lights outs so its really dark. spray a mist of water on the coil packs and spark plug wires to see if you have spark/voltage leaks jumping out from them. sometimes the tiny sparks will be so fine and skinny you can barely see them so it needs to be dark. hope this helps your trouble shooting. a coil pack could have such a fine crack for the voltage to leak from that you cant see it.

SOURCE: 2001 Kia Sportage runs rough

Yes my frend open the bonnet and stand infront of the car, on the left hand side between the engine and the boddy there is a black round container with pipes going into it. next to the container there is a vacume switch, 99% of the time this pipes going into the switch is brohen or the pipe is leaking. Enjoy Willem SA