OK, ive tried my saxo 1.4 on a track day. I know its not much of a car to try but just wanted to see what i could get out of it. If i go over 70 and take my foot off the throttle , i get alot of vibration in the pedal. However if i get it over 80 and take my foot off , i dont .. any ideas what this could be as it causes pins and needles and want to get more