To answer coil plug question (sorry forgot): I bought a set of 6 new coil plugs and had a local shop replace all plugs. For some reason, instead of just replacing plastic plug (the piece that comes apart) they spliced into original harness. It is very possible that they screwed up somewhere along th...

Turns out I was freaking out over nothing :). The cause of misfires and other problems were indeed in the ignition coil plugs. As I mentioned before, I did purchase new coil plugs from Amazon (obviously made in China). Turns out 3 out 6 were purely assembled. The wire was not crimped properly. As th...