Ok, so i forgot to refill the delorean before hooking it up and starting the push sequence, turned on time circuits, set the date, hitt 88 mph and the game simply froze.
EDIT: Same thing happens when mr fusion is full as well.
Here is the correct file. Replace the existing objects.dat file in the data folder, with this one.
You will then be able to push the delorean to 88 miles per hour (without crashing)
object.dat