Working on a 2012 dodge Journey rt v6. Rough idle. Really rough. Codes P0304. Replaced the entire bank with new plugs and coils. No change. Did the entire banks fuel injectors. Runs better but still rough. Just a bit less jerky. Now I'm getting getting a p0304,p0306 and a P0300 generic.

Today I did that front banks valve cover gasket, plugs and grommets.

Pulled out the backs spark plugs and they are oily on threads. Changed about a year ago and I really don't drive much. My Mom has a mastectomy next month and possibly daily treatment for 5 weeks afterwards. I've got to get this done and I can't afford a mechanic in Canada. Lol Plan was to change the backs gaskets as well but I'm exhausted and need a shorter tool to get the sensors off on the left side. Really struggled to get to the back of the valve cover with any tool.

Pic of the the back plugs. Anything to note? Where should I go next? Was going to put it together and start it up but now not sure.