so, i think this is easy fix, just need some confimations, i bought this car about a week ago, its a 2011 svtpp gt500, the car fire up normal if u drive it everyday, but if u let it sit for more than 2 days, it will takes almost 3 seconds for the car to fire up, is it because of the bad battery or i need new spark plugs? car has 8500miles now. dont want take it to the dealer, never trust them here.