Vacuum leak in a/c hose, in cabin

[SmokeyMCN]

So I've been posting about a vacuum leak for a while, first I posted and everyne said it was my brake booster if I could hear the leak in the cabin, I changed the booster and still the leak is there.

I hear the leak in the cabin, Now everyone is telling me it can only be the A/c vacuum lines that go into the car,

Can anyone help me out with where these hoses are and how I can access them / change them?

[nissanfreak12]

We don't have A/C vacuum lines, ours are all electronic. Do you have an aftermarket boost gauge inside the car? Electronic boost controller? Booster for the clutch?

Only vac we have in the car or source that has vac to it is the brake booster for the NA and clutch and brake booster on the TT, stock. When does the hissing occur? Are you sure its a vac leak? does the car run different/bad?

[Ace2cool]

I think I have a similar thing going with mine. When the A/C is on, it'll hiss for about 5 seconds, stop for about 10, and then hiss again. I never really cared to check on it, cause the A/C blows cold, never smell any refrigerant, and never had any stumble or performance issue.