I'm not sure if this is in the right forum, because I'm not quite sure where my problem is coming from. My 93 Impreza has a horrendous vibration. It's noticeable at an idle, but it's at it's worst at speeds over 50. I've checked my tires, no signs of bulges or a bad tire. I'm thinking it's either bad motor mounts, or something else. Also, the vibration seems to stop and then start again by itself at highway speeds; and I can feel it mostly in my seat, more than in the steering wheel.
Help!