Might be tight, loose? Meaning so tight that the car snaps loose, all the same symptoms of being loose but the car is just to tight. If it is good when first entering and as the car loads or rolls over then all of sudden loose then your to tight, if it is loose as soon as you start turing the wheel then probably not the case. If your just loose on throttle then you may want to check your rearend square?
Hopefully this is helpful, hard to say without more information such as setup and track surface, loose on entry, middle or exit, or loose on braking, or throttle off brakes etc. etc.
