Hey Scotty I have a 91 Ford F-150 with 4.9 inline 6. I was wondering if you could maybe explain the vacuum diagram to me. I need to check and replace my vacuum lines but I'm not sure which line goes to what or how to read vacuum diagram to find out for my self

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ScottyKilmer
ScottyKilmer

Editor

they are just like wiring diagrams, get a manual with the pictures and designations of where each one goes.