Another one for you guys. I am trying to test my power booster to see if it has a leak. I am drawing a vacuum on it, but can only get it a bit less than 15inHG... Then if I let it sit, it will slowly bleed off to zero. I then get into the truck and get about 1.5 power assisted operations. I have had, for a while now, pretty weak brakes. I have to push down quite a bit to get the truck to stop. It will lock up the brakes, but it feels like it takes more pedal travel than it should. Plus, I am trying to chase down a possible vacuum leak that may be causing me to fail emissions... Should the booster hold a steady vacuum?