The shaking and jerking at the start of races is normal confirmed it.
verified that.
I am not quite sure what you mean with lumpy. If you mean that the effects are weak, it is due to GP4 that has no good FF effects at all.
If you mean the wheel feels unprecise or even seems to lose calibration or center position in races, do the following: before the start of the race when the lights are still red (or before leaving the garage when the jackman have already let you down) move the wheel to the extreme left and to the xtreme right. This also works with other games (GPL) and should solve the problem.
Post Edited (04-17-03 17:53)
REHAB IS FOR QUITTERS