I read the first post and apologise for not reading the rest iof weve moved on but if the van was fine when laid up then fix it with whats on it. The symptoms you advise could be a mutitude of problems and its best to rule out each element that could cause the problem before you start replacing items. if it doesnt work or solve the problem then you still have that to do and have just considerably confused the issue. Was anything done to the van whilst laid up? battery off - welding- battery left on charge?