[Chronology]

Originally Posted by Smiley

Guys! I installed my brand new coilovers onto my 2015 Scion FR-S, but I am having an issue. I got my wheels aligned and balanced without a problem. But now when I drive at about 22 mph to 33 mph, my wheels begin to shake (I almost want to say wobble). When that happens, my car begins to bounce up and down as if I am going over a million smooth wavy bumps. Can anyone tell me why this could happen? Also, my back coils, every time I hit a minor bump, I hear a slap from inside the vehicle. I cant hear it from the outside though. I feel like I almost have no springs on my coils. I am a beginner at this. I love my car and just want a clean ride. Can anyone help me? Before I take it to a suspension shop and they make me pay them for something that does not need to be fixed.

I had a similar issue (bounce) with my RS*R's. My mistake was running track settings on a normal road. Adjust your settings from stiff --> soft, start at the middle and work your way to stiff or to soft.

If you are hearing noise (metal to metal) it could be the indication of the product, it's common for coils in that "range" to make noise.