I have completed the FP test and here are the results.

Just ignition on and engine off and vac on I get 52 psi.
Engine on and vac on I get 46 psi.
Engine on and vac off I get 56 psi.
I let the car run with vac on for 30 seconds and shut the engine off. Right after I shut her off the FP falls to 40 psi and in about 20 seconds climbs to 52 psi.
After 30 minutes it is at 33 psi.

So looking at the spec everything is good except I don't know about the the values read after I shut her off.

Is that behavior normal?

Thanks.