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48500 miles and I am having misfire issues on my 2014 sonic. Trying to work through a possible bad tank of fuel. Added Seafoam and it seemed to help. Idling better stumbles on acceleration....sometimes more some times not much. It was having an off and on stumble at the stop light AC on....we...

2014 sonic RS owner just trying to keep it going.

So this weekend I changed the valve cover due to the PCV issue. No oil leaks so far and all seems well. But I do still have an intermitant coolant leak. I think it's the coolant intake on the driverside of the head. I have and aluminum replacement ready to change it....but why doen't it leak all...