Excellent article by Lee Kuhlke in the July 2005 issue of Soaring magazine dealing with methods of troubleshooting your pitot/static/total energy system. I don't have the link available, but with the above information (Lee Kuhlke, July 2005, Title "How's Your Plumbing) you should be able to find it.Highly recommended.

Also, a great document from Mike Borgelt on the same subject.

https://www.dropbox.com/s/iqklz472pw...Leaks.pdf?dl=0