If you havn't recieved your new pot yet and still want to race there is an easy solution to enable short term fix, as follows.
Set up and plug in wheel
start LFS, join server and pit out, or pit out in single player any car will do.
Press shift+O, click controls, click axis/ff, click recalibrate axis, now press both pedals
but only press them to about 80-90% of full travel, then let them return
Rotate wheel left then right to full lock and back, now click yes to calibration lock (this lets LFS believe that 80% is 100%)
Exit options menu and test on track
If no better recalibrate again, and only press pedals 60-70% full travel, it can take some getting used to.
I have used the above method many times as sometimes I just want to race and think about taking the pedals apart another time.
SD.