Many thanks to all who contribute here. I've found lots of great info that has greatly helped me since I purchased my 1991 Firebird V6 about a month ago. I'm eagerly looking forward to restoring my bird.

I'm seeking some assistance in identifying where a particular vacuum line leads and how to fix it. I noticed the leak while cleaning the intake throttle body. There's a noticeable hissing sound when it idles. I've attached photos for reference.

Additionally, after the car has been running for a while and I turn it off, it struggles to turn back on smoothly. I often have to give it a lot of gas to prevent it from stalling. Could this issue be related to the vacuum leak?

Thanks once again for all your feedback and support!

Location on back of intake manifold

 

Hi Ferdog, welcome to TGO

The part you seek is under $3 at Rock Auto;

https://www.rockauto.com/en/moreinfo...t=7036&jsn=886

 

that would go to the "orb" under the battery try area.. thats for your ac vacuum reserve

 

Thanks for the info! I installed the new part and ran the vacuum line to the reservoir underneath the battery. I was hoping this would have stopped my stalling problem. Car turns off when coming to a stop. I’m thinking of just replacing all the vacuum lines. What are your thoughts?

 

My guess would be your IAC would need replacing or more likely cleaning

 

I replaced my IAC and TPS along with cleaning the throttle body.

 

Did you clean the IAC passage? that thing gets crusty and nasty