Engine stalling

[Kip7143]

So, there’s a line from the canister right above the fuel inlet. Is it safe to say that line is a line that runs air into the carb? Because the float bowl is right below it and that’s where I found the majority of the pieces. I did remove the carb and clean it again when adjusting the needle and seat.

Plugging all the hoses won’t allow the tank to breath, but would unplugging them all have a negative affect as well? Once I cleaned the needle and seat and installed the carb I did not hook up the canister. All the vacuum lines are unplugged. Could that cause ****ty idle and stalling?