302 cylinder misfire

Asked by Dec 12, 2009 at 02:55 PM about the 2001 Hyundai Sonata GLS

Question type: Maintenance & Repair

my 01 sonota gls six cylinder has a po302 misfire code. real rough idle and is worse in gear. also there is a weird pop sound from the engine...i changed the coil pack and it didnt change..any suggestions?

1 Answer

25

If spark plug insulators(the porcelin part) crack a rough idle may occur, this isnt to say that would be your entire problem but may be somewhere to start

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