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Originally Posted by kbragg
One day I was driving my 2000 Kia Sephia on the highway. When I got off the highway the car started shaking and sputtering and the check engine light came on and it started to blink. I stopped at my destination, where I was at for a couple of hours and when I started the car up the light was not blinking, and the car was behaving normal.
About a week later I had to drive the car about 90 miles, which it made just fine, however, on the way back from the destination the sputtering problem and the blinking check engine light came back on.
I took the car to Autozone and it had 5 codes: cylinder 1-4 misfires and another code that was either evaporation system or emmission systems leak...I can't remember exactly on that one.
I replaced the plugs, the wires (which I am sure were put on properly), the coils, and the fuel filter and for good measure I changed the oil and checked the air filter as well. The problem remains.
What else could be causing this misfire problem?
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You replaced the wires?? and the coils??
If both of those have been done I would check the secondary wiring to the coils and make sure that the wiring is not cracked. Have seen that before and cause intermittent driveability issues. Also listen to the injectors with a long screwdriver next to your ear and make sure they are clicking. It is possible that they are sticking but that is rare on sephia.