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Automatic 2008 Nissan Altima 2.4L 4 cylinder miss firing and check engine light is blinking code reader says P0303 so i changed the coil pack on cylinder 3 and its sorta still doing it not as badly.. need help please

  

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Automatic 2008 Nissan Altima 2.4L 4 cylinder miss firing and check engine light is blinking code reader says P0303 so i changed the coil pack on cylinder 3 and its sorta still doing it not as badly.. need help please


4 Answers
1

Blinking CEL means serious misfire, and you should shut the engine off quickly or else you can damage the cat. Did you do the replace the sparkplugs too?


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Check the FAQ:

https://carkiller.com/scottykilmer/qa/misfire-4/


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try flip flopping cylinder 1's fuel injector
if the problem shifts to 301 code, most likely your fuel injector is bad


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New spark plugs please.


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