OK, so I removed the trunk latch mechanism, and it has 2 small electrical plugs, and the pneumatic hose from the PSE attached. There is an actuator attached to the pneumatic hose that has a small piston that moves downward when you depress the trunk button to open the trunk. That works, but on my car, the PSE stays running for about 10 seconds, during which time the piston is down, holding the small trunk release lever open. When the PSE finally "gives up" and shuts off, the piston retreats and the trunk can be closed. My guess is that on a properly working mechanism, the piston would move down, unlatch the trunk, and then immediately stop and retract and allow the trunk to be shut again immediately. My guess is that the PSE requires some sort of pressure feedback to shut itself off, and its either not getting it for 10 seconds, or it just gives up after a certain amount of time. The probable reason its not getting it is that there is a leak in either the hose leading to the trunk latch, or the actuator has a leak. it would be good if it was the actuator, as it looks easy to change. Does anyone know if that part is available as a stand alone part, or would you have to purchase a whole (expensive) trunk latch? I did a quick search, and did not come up with a trunk actuator as a part.