realy need to know what year this van is but try putting the live jump lead on the live of the starter motor and the earth on to the engine if not starting with the right key then its the soliniod that sits on the starter motor/is it smiley front and u lost key then imobilizer will stop u from starting to get it going will have to get to diesel stop solinoid and change for pre smiley front one
steve
December 2009