JBurmenko

Hey everyone I have an 06 A6 corvette i recenty installed headers on (with a proper dyno tune), as well as a vitesse throttle controller, and an msd 2-step module. Recently my car seems to be misfiring/ having not as smooth as of idle. Few questions, does this seem like one of my sparkplugs went out (I have no check engine light). Also is the MSD 2 step module bad for my car if I dont use it to launch very often, more just to get the pop from hitting the 2 step, what affect does this have on my car.\

Thank you! Any comments are appreciated.