Must be luck of the draw with these systems. Mine work perfectly well, and has for the 32 years I've had the car? Original vacuum canisters, etc. Only issue I have is with the driver's door - it sticks if the temp is below say 60 degrees. But If you give a it nudge, it closes right up. When it's warm outside, it works fine. Pass side never gives me a problem. Maybe I shouldn't post this. As soon as I do, I'll start having problems.