Welcome to 986 forum! This is more of an introduction section so please head over to the Boxster Discussion forum and post your question/issue up in there. Many of our community members should have input for you. BBi Autosport is in SoCal and are great at what they do. Maybe check them out. We also supply parts. Also, be sure to check out our tech articles while you continue to diagnose the issue. Post a picture for us here when you can.
Porsche Boxster 986/987 (1997-2004) Technical Articles | Pelican Parts
http://www.pelicanparts.com/Porsche/index-SC.htm