wei of the road glitch fix
i had completed all 18 races with no achievement popped i was just before the last mission and wanted to resolve this first, i tried going back to do races with no fix did all 17 through the replay improved my times on most and still nothing.
did the fight club, still nothing
i had remembered that i failed the mission for fast girls, i hit a divider and some how flipped the car after crashing into a pole mid-air. i went back and replayed the mission without failing during the racing segment and it popped the achievement the moment the race part was finished.
dunno if it will work for any body else but it IS worth a shot.