One major reason is the coils and plugs. I changed mine and the vehicle runs great again!
There are several things that can cause your 2002 Kia to idle rough. The most common cause will be bad spark plugs or a bad spark plug wire.
The 2002 Ford Expedition has a V8 engine.
The 2002 Ford Expedition has 16 valves.
The 2002 Ford Expedition has a 4-speed automatic.
The 2002 Ford Expedition is a gas-powered vehicle.
Ford Expedition & F150s have a common problem. Usually it will be a collapsed vacuum hose. Other thing could be your idle control valve.
The height of the 2002 Ford Expedition is 6 ft. 4.5 in. (76.5 in.).
The maximum payload of the 2002 Ford Expedition is 1532 lbs..
The 2002 Ford Expedition is 17 ft. 1.8 in. (205.8 in.) long.
The 2002 Ford Expedition's turning circle is 40.4 ft..
The 2002 Ford Expedition has a 19.1 degrees angle of departure.
The curb weight of the 2002 Ford Expedition is 5468 lbs..