I have a 3-stop Dover LMH. It has a very intermittent and difficult to duplicate issue but essentially what is happening is the car will fail to take off in the up direction. It has only happened in the up direction from either the 1st or 2nd floor. The motor runs but the oil is just bypassing back into the tank. The valve has been replaced as well as the following relays: high, high2, high3, u1, u2, hww1, hww2, hww3, d1, d2 & vcx. At this point I've run out of ideas as to what could be causing the issue. Not sure if it temperature related, as I can simply reset the car and issue another call and it will run normally. Any advice you may have would be greatly appreciated.