Bulmaro

Hey guys I’m new here , I have a Cusco catch can on I bought the car with it … I just got my car back from getting clutch replaced .. and the guy that did my clutch said I had a hose missing in the catch can .. so I researched and he was right I was missing the second one , the one that’s in front of the engine and you have to block off one part .. so I went to get a hose and connected it .. and started throwing out white smoke ? What’s going on?