how can you tell when your struts are bad....a month or two ago, i did a tokico/sprint installation and of course the ride was a lil bouncy....but now, when i hit bumps or drops in the road, it seems like my car takes them kind of hard..still bounces a lil, but the car just seems to take the bumps really hard as oppose to when i first did the installation....is this the sign of a bad strut/struts?