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It is probably an ignition problem. Check the mis-firing cylinder's ignition cable from the distributor to the spark plug. A quick check would be to replace the ignition cable on the mis-firing cylinder with one from a firing cylinder. That can rule out the cable. You could have also have a broken or fouled plug. or a bad distributor cap. Carbon tracks inside or on the outside of the cap can allow the spark to jump to ground. If it isn't that, then you have a collapsed lifter or something more expensive.
What else can I help you with?
How many valves does the 2002 Kia Optima have?
The 2002 Kia Optima has 16 valves.
What are the cyl head bolt torque specs for a 2002 Kia Optima?
2003 Kia Optima 2.4, 16 valve.what are the cylinder head bolt torque specs torque at?
Is the 2002 Kia Optima electric or gas?
The 2002 Kia Optima is a gas-powered vehicle.
What kind of transmission does the 2002 Kia Optima have?
The 2002 Kia Optima has a 5-speed manual.
What size engine does the 2002 Kia Optima have?
The 2002 Kia Optima has an inline 4 engine.
What is the turning circle of the 2002 Kia Optima?
The 2002 Kia Optima's turning circle is 34.1 ft..
What is the cam type of the 2002 Kia Optima?
The 2002 Kia Optima has double overhead cam (DOHC).
What kind of fuel does the 2002 Kia Optima use?
The 2002 Kia Optima runs on regular unleaded.
How long is the 2002 Kia Optima?
The 2002 Kia Optima is 15 ft. 6.2 in. (186.2 in.) long.
How tall is the 2002 Kia Optima?
The height of the 2002 Kia Optima is 4 ft. 7.5 in. (55.5 in.).
What is the rear shoulder room of the 2002 Kia Optima?
The 2002 Kia Optima has 55.7 in. of rear shoulder room.
What is the front head room in the 2002 Kia Optima?
The 2002 Kia Optima has 39 in. of front head room.
