Thanks for your reply Steve. I am on the verge of taking this puppy in to the real mechanics but am not quite ready to give up yet. Hopefully, with more symptoms we can narrow this thing down. My door locks are slow to actuate even while driving. Only the drivers' door unlocks after the car sits for more than a day. My brakes appear to be fine. I dread to think I have to get behind the upper console to check or replace one of those vacuum switches. If I could isolate the vacuum system I could fine the source of the leak, provided I have enough vacuum to begin with. How much vacuum should I have and where should I measure it? Will a regular vacuum guage do for testing the system? Is there a location where I can isolate the door locks, etc.? My cruise control works OK also.