Well i`m not sure whats going on with my setup, i tried again with a few other cars. I`d say 3 out of the 5 cars i tried were just uncontrollable on the grass. Literly like ice, taking foot off the accelerator and gently moving the steering wheel back towards the track made no difference. I had traction control on full. I`ll try again without the steering wheel, i`ll try a joypad in case there is something not calibrated correctly. thanks.
Try renaming the AMS2 Documents folder , everything will have to be set up again but I've fixed some weird things by a full reset. Worth a shot.