Over-Charged Engines Declare the use of Over-Charged Engines in the Movement phase before moving the vehicle. Roll a D6. On a roll of 1, the engine stalls and the vehicle may not move at all this turn. On a 2-3 the boosters fail and the vehicle moves normally. On a 4-6 the boosters work and the vehicle can move as if it were a Fast Vehicle this turn; the maximum the distance it can move is 18".