So here's what I found: No leaks detected with smoke machine. I did find the doors all maintained vacuum for 4 hours with a Mity-vac attached. The fuel door has its own line and could not hold a vacuum. It had no detectable leak with smoke machine. It appears the diaphragm in the lock unit to the fuel door must be bad.

I plugged the port on the vacuum pump until I can get a new one.
Steve