I don't know that it has a single solenoid.  I runs a high presure pump into a common rail system. One thing I am going to check on I found mentioned in a couple forums is a screen in the fuel system

http://www.dieseltruckresource.com/dev/1998-international-4700-dt466e-question-first-post-t299239.html

http://townation.com/forum/?action=goto&search=1#topic/International-DT466.htm

I'm not convinced this is the problem but it looks like something we need to check anyway