I had lowered my mustang with stang suspension on stock struts. I put the stock springs back on and a little after I did, I noticed a noise coming from under the passenger side of the car. I looked underneath the car and nothing seems to be loose. I even retightened the strust down. I can't seem to figure what is making the noise. The noise happens when I hit a bump or the car sways from left to right.

Any idea's that I should be looking for or something I am missing?