Thank you for your help Ran
i will probably pick up the arduino i want to make this as easy as possible,
as far the the way the solenoid work is a wound up motor that releases the spring. but im thinking if i make a solenoid i should be able to send it a pulse of power and make it strike a valve or at lease im hoping i can.
whis is what im trying to build, also will i be able to download the program that is already programed in the chip? http://www.cones-stuff.co.uk/Daystate%20MK3%20Battery%20Swap.htm