[Schocc]

Usando a funзгo SetVehicleVelocity
Ex:

pawn Код:

if (!strcmp("/carjump", cmdtext))
    {
    if(IsPlayerInAnyVehicle(playerid))
        SetVehicleVelocity(GetPlayerVehicleID(playerid), 0.0, 0.0, 0.2);
    return 1;
    }

@edit oque vc procura й Speed Boost contem no meu gamemode antigo tbm se quiser pegar dele Link