Yes those readings are fine, MAP is OK
Lower Hz = higher vacuum
At 20" of vacuum, engine idling, 106Hz would be correct
It would only go down to 80's when decelerating and intake manifold vacuum peaked in the high 20's" of vacuum, so my bad if I posted that 88Hz was expected at idle, oops.
0" vacuum, engine off, should be above 150Hz but I don't think your 141Hz is an issue.
Computer "learns" the range of some sensors, like MAP and TPS.
When you turn on the key the computer use the MAP Hz as 0" vacuum, and this is also an altitude compensation method, driving at 4,000ft elevation the oxygen levels are lower so less fuel can be added, MAP baseline Hz compensates for that.
Air pressure at sea level is 14psi at 4,000ft it is 12psi, in inches Hg it is 29" and 25" respectively, MAP measures air pressure, so at 4,000ft the MAP is reading in essence -4" of air pressure, so a "vacuum" with engine off.
If you are not located at sea level then your 141Hz could be completely normal
But in the end the O2 sensor data will also override MAP data once engine is running, if MAP was reporting slightly incorrect baseline, exhaust would be a bit lean or rich, O2 data would correct it.
Good read here with vacuum/Hz table for Ford MAPs:
http://www.aa1car.com/library/map_sensors.htm