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Hello guys,

I've swapped out the coil on cylinder 3 after my engine light first came on a couple weeks ago. I remember putting in my reader with it showing a P0303 code for the 3rd cylinder misfire and I went to check on the spark plug and that spark plug was fine. The coil wasn't in good condition so I replaced it. It ran really well after I replacing it, but a few days later, my engine rattled and then my engine light came back on again with the reader showing the same code for the misfire on cylinder 3. Nothing is wrong with the coil and nothing is wrong with the spark plug. What do you guys think I should do here?
 
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