Yes, but 3 days of cavatating & pressurizing? I could see there being an air leak if it never pressurized, but it will...sometimes. If there is an intermittent air leak, where & what would cause it while sitting still? Frustrating....once back in the driveway I’ll delve deeper, for now just dealing with it....
Here is another video about pump troubleshooting. At about six minutes there is an explanation of the adjustment set screw, and the method to get your pump running a bit more smoothly.
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2018 320S Outback
Alan & Patty
Southern Az
TV: '17 Colorado V6 Z71 4x4, Tow Package, GM Brake Controller
Adventures: 54 Nights: 341 Towing Miles 43,780