Falcon eb ii keeps stalling temperature fluctuates goes through a lot of water does anyone know how to fix it?

It will more then likely be a blown head gasket(see if you can get a compression check done),it is a big job to fix on your own so you might want to take it to a mechanic It will more then likely be a blown head gasket(see if you can get a compression check done),it is a big job to fix on your own so you might want to take it to a mechanic