I have a 2000 golf with a 1.9 alh. I left my girlfriends house one night and was driving home and accelerated up a hill then I felt a sudden loss of power. My car usually goes into limp mode if I push it past 3000rpm and if I turn it off and on limp mode goes away but this issue is constant since that night. The turbo spool is significantly quieter and when I give it about half throttle or try to accelerate up a hill there’s a weird sound coming from the engine bay it sounds just like air escaping the engine bay. I’m hoping it’s just a vacuum leak but it’s really loud and my car makes a lot more soot now. This is my first tdi so I’m new to diesel motors. Can someone identify this issue?