[Florin48]

you need this in OnPlayerKeyStateChange, or something, I think there are more ways to make a speed boost.

PHP код:

if(newkeys & KEY_FIRE)
        {
if(speed[playerid] == 1)
            {
                new Float:v[3];
                if(GetPlayerState(playerid) == PLAYER_STATE_DRIVER)
                {
                    GetVehicleVelocity(GetPlayerVehicleID(playerid), v[0],v[1],v[2]);
                    SetVehicleVelocity(GetPlayerVehicleID(playerid), v[0]*1.8,v[1]*1.8,v[2]*1.8 );
                }
            }
}