So I got a 2012 3.5 with 195k(yeah I know its alot lol). And I has a horrible misfire under hard acceleration and the flashing check engine light, so I changed the spark plugs, ran some injector cleaner and it made a world of difference, it runs absolutely perfect unless I'm seriously getting on it, no check engine light or anything but it shudders and sorta feels like it's missing when in the throttle hard, just wondering if theirs anything I should replace/update that could help since the motors seen some miles. Any help is appreciated!
Jonah_3.5
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