Thanks for the video.
The best way to check vacuum operated systems like this is with a handheld vacuum pump.
Basically, you want to work your way through the system and disconnect different lines through the system and apply vacuum to it and either plug the other end so that it holds vacuum. Or leave it hooked up and see if you are able to move the actuator.
If you cannot hold a vacuum or move the door, then you have a leak. At this point you need to shrink the connections even more until you find the portion that has the leak.
Some people blow through the line with one end plugged but that is not as definitive. Basically, if you have resistance when blowing then there are no leaks.
Thursday, April 7th, 2022 AT 1:08 PM