My UPR kit did the same when I put them on.
I had the ride hight set on the low side and there wasn't much tention on the spring, so when i would hit a bump and the suspesion would raise the spring would float between the the top and lower mounts.
Try raising the car a little to get more tension on the springs, just enough so when the strut exstend up there is still tension on the spring at full travel.
I had the ride hight set on the low side and there wasn't much tention on the spring, so when i would hit a bump and the suspesion would raise the spring would float between the the top and lower mounts.
Try raising the car a little to get more tension on the springs, just enough so when the strut exstend up there is still tension on the spring at full travel.