Suspicious my gauge is wrong
I have the Harbor Freight pump, and I noticed that when I start pumping with it, the needle on the gauge doesn’t start to move until after I’ve given it a couple of pumps and their is already a decent amount of vacuum pressure in the tube. Have you guys noticed this with your pumps as well? I’m suspicious my gauge could be reading an hg or two less than what the actual vacuum pressure is inside of the tube.