issues with coil overs? Options

[Newb]

hey, this is actually for my gfs car. She has a 94 canadian gts, we recently lowered it on kyb gr2s, and ebay coil overs, yea I know, didn't wana shell out big bucks at the time and wanted the adjustablity of coil overs, if it could be done again I would just bought a nice set of d2s or something. Anyways the issue with the car is it is making weird sounds that I don't know where they are comming from...I work on nissans all day and they are set up different. Sounds like a dinging sound comming from the suspension. Mostly when your driving slow and you cut the wheel sharply. I'm guessing this is a fairly common issue, is there anyway to fix it? I've tried raising the car on the coil over, and making sure everything is tight on several occasions, but if anything its gotten worse. Also is it bad for anything?

thanks guys.