Have you pulled the spark plugs and taken a look at them?
I haven't. That's a good call I'll check them out tomorrow.
2014 GT A6 - Stage 2 D1 Procharger, E85, JPC return style fuel system, ID1000s, BMR UCA/LCA/Panhard bar, Steeda Ultralite springs, Koni Streets, AMR 19s w/ 305 nittos
2011 GT M6 651rwhp/518rwtq - Sold