just had new coilovers installed and after a couple of days i noticed that here is alot of noise coming from them and they r really bouncy compared to my old skunk2 3"drop coils and also my rear end like to sway hard to either side bout 1 to 2 inches not going to that shop any more ... so any help would be awesome if i can fix it at home that would be better

 

I'd check that the nut on top of the coils is tightened down the whole way.
Also, what kind of coils are your new ones?

 

agreed. Also just double check everything like the mounting to make sure they are fully seated