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.
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Monday, May 30th, 2022 AT 4:58 PM