Vacuum leak giving me trouble

[Chochebiznesz90na22]

I'm a newb but I know the basic I do my own oil n plug change whatever I want to earn, I want to change out a dirty radiator but first I've had the vacuum leak for a while that suddenly got worse, it's some behind the engine but I can't narrow it down

[DCaff300ZX]

Welcome to Nico!
We will need a LOT more info than that to help you out well, so here's what you should do.
Check the attached service manual for the tests for vacuum leaks, and start narrowing down your issue that way. You can post any questions that arise from that which will be much easier for us to help you with, rather than taking a stab in the dark guessing about possible issues especially since we know nothing about your car such as condition, mileage, etc.
Post that info up as well!