Yes please tell us more, what you describe could have any one of a number of causes.
The motors should spin over happily enough on a lot less than 20 v.
If they don't spin over when connected to say 6 volts dc then it sounds like a car problem.
If they do spin over when connected direct to a power supply, but not the track either the power is not being delivered to the track rails or there's a pick up problem.
Difficult to offer more help without more info on what you've got.
The motors should spin over happily enough on a lot less than 20 v.
If they don't spin over when connected to say 6 volts dc then it sounds like a car problem.
If they do spin over when connected direct to a power supply, but not the track either the power is not being delivered to the track rails or there's a pick up problem.
Difficult to offer more help without more info on what you've got.