He’s saying to get a flashlight and hunch over the back side of the engine. First look intently at all the vacuum hoses and lines to see if they’re intact. Personally I would just buy some vacuum hose and the thin hard tubing and replace it all while I’m there. If needed, you can use a Mityvac (handheld sucky thing with gage) to apply vacuum to see if it holds or you have a leak.I'm going to have to sit down and research what you're suggesting..... Thanks!
Insert Giphy here of Spock saying “Indeed”If you substitute brake line for that plastic, you'll never break another one.