mitchel on demand 5 says this
Vacuum Test
Connect vacuum pump to MAP sensor. MAP sensor is located near throttle body. Apply vacuum. If MAP sensor does not hold vacuum, replace sensor.
I also have a vacuum diagram from mitchel on demand 5.
But the vacuum test shown above seems really lame to me, if I have a vacuum hand pump gauge then how can I test every vacuum line on the engine, do I need to do it 1 by 1? And either way what am I supposed to pump the gauge too before I stop a wait a minute or two to see if it leaks?