G'Day Matthew, WTTC
Not long back I purchased my wifes Galant and done a little bit of work to it, and put a few new parts on it.
Check out my thread, you will find a bit of useful info there....
http://www.ozvr4.com/threads/phil069s-2014-galant-vr4.14309/
I sure am.
Plugs, leads, coilpacks. Most likely spark related.