When I was playing this service I couldn’t get above 20-25 mph and when I went into idling the train would come to a stop. If anyone else is having this problem all you need to do is find the switch which allows you to change the brake system. It will be in either one of the cabs and when you find it set it to vacuum goods and you should be good. Hope this could help. I have attached a picture of the switch you need to change.