Hi,
The door locks have become "flakey" and the engine shut-off has started having thoughts of its own, as well. By "flakey" I mean only one or two of the five will lock after a minute or so and none will unlock. I understand these are symptoms of a vacuum leak. I've checked the hoses at the brake assist and found one black one that went through the firewall and then just stopped in mid-air with no connection point for it anywhere in sight. I can't find anything to account for the problem under the dash and next I intend to isolate each door actuator from the system to see if there is a leaking diaphragm somewhere. I feel like I'm literally grasping at straws.
Where is the best place to start looking? I am hoping that this is something that happens at some particular point in the system the vast majority of the time.
Is it the vacuum tank or a door lock actuator? Possibly the brake assist? Is there something that "usually" is the reason for this problem?
Thanks very much in advance,
Ken