Can't just keep replacing parts hoping to change the correct one. That gets very expensive very fast. Before continuing it needs to be determined whether the issue is fuel or ignition related.
It is a bit confusing when you state it starts but won't turn over. Part of the issue could possibly be in the explanation you or your husband are giving to the mechanics. I find that extracting the correct information or description from people about an issue is usually sometimes more difficult than the repair itself.
Mike.
