ok, replaced fuel filter. cleaned MAF very well. tripple checked for vaccum leaks... will do a fuel pressure test next few days... put near full tank of 93 octane in thinking maybe crappy gas was put in it at the dealership not knowing about the tune (which was i'm sure a 91 or 92 octane tune, AND the knock retard is destroying the performance. also put a bottle of lucas injector cleaner in it, (regular not the full fuel system stuff) just for shits and giggles... will see how it runs tomorrow.