[tim]

The original front spring in my car was thought to be to stiff as well. It turns out that 84-87 C4's use a longer front spring than 88-96 C4's. I switched to a shorter spring and the problem was solved. The longer spring was jamed between the outer ends of the front cotrol arms so it couldn't flex. The front of the car just bounced when it hit a bump in the road.
Tim