Don't know what type of control valve you have but the Haldex Type EGP IR 90555105 Ride Height Control Valves (RHCV) have a 45 degree up or down travel from Center (level). They use the same valve for both right and left installation by flipping the spool valve in the unit. There is a small mark on the spool to indicate direction. If the lever arm is too short it can over-range the RHCV. Are both sides affected? If only one side is affected I would measure at length of the lever arm on the good side and adjust the problem side to that length to see if it helps. If both sides are a problem I would increase the length of the lever arm to see it that helps. My rear suspension has 3 inch travel up and down from level. My leaver arms are 6 inches long. I was having problems on one side and found that that side was set at 5 inches. The longer the lever arm to slower the valve responds.
