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Change the 2 coil packs and the 2 spark plug wires and for good measure the spark plugs as well.
Probably 4
The spark plugs and wires are under the cover plate on top of the engine. The cover is held on with six philps screws.
on my kia sephia it is 32 on a spark plug gapper
The Kia spark plug wire kit has only two wires. What about the other two cylinders?
were are the sprk plugs located on a 1998 kia Sophia
One or more spark plug wires could be going bad. The porceline insulator on a spark plug could be cracked.
Spark plug socket to the extension adapter on the ratchet and place the socket firmly over the spark plug turn the plug counterclockwise to remove it.
the spark plug wires have 2 coils attached so they are not cheap. look online at autozone they show them there.
top center of engine under the six bolt black cover.
when looking at the top of the engine, there is a cover that you have to take off to get access to the plug wires. in order to reach the back plugs and wires you will have to remove the upper part of the intake.
The 1999 Kia spark plug gap setting is .035. Most spark plugs will be pre-gapped by the spark plug manufacturer.