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Old 04-03-2021, 11:17 PM   #1
StrJacob
Scooby Newbie
 
Member#: 523469
Join Date: Apr 2021
Default 2011 WRX misfire code on warm starts

I was just wondering if anyone knows what might be wrong with my WRX. I get a P304 missfire code on most warm starts, usually when I get gas, but it would always go away after a few drives. I couldnít feel a missfire but sometimes it feels like it is idling slightly rough but Iím not sure, but as soon as I start driving it is completely smooth. The car also uncommonly has a hard time starting like it is turning over but doesnít ignite for a few seconds, usually on cold starts. I changed my spark plugs recently, and it seemed like these symptoms got worse after, but would still happen occasionally before. Thanks in advance!
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