Hello,
There are three different styles of vacuum line diagrams which are California, Canada and Federal I have included all three of them with a guide on how to check for vacuum leaks.
https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge
Check out the diagrams (below). Please let us know if you need anything else to get the problem fixed.
Images (Click to enlarge)
May 30, 2022 at 4:58 PM