Welcome to the Pelican community, Doug! You might get more help in the 996 section, so I've moved your thread to there. Some of our community members should chime in with some advice. The 911 tech section is mostly geared towards air-cooled 911's.
Don't forget to check out our tech articles for some help on diagnosing your issue as well -
Porsche 911 (1998-2012) Technical Articles - Porsche 996 & Porsche 997 - Pelican Parts. If you comment at the bottom of one, our tech will come in with some advice for you. Good luck!