air intake (heated vs non-heated) and IAC bypass

[kthnos]

what altitude.
most folks below 1000 ft but no all.
like Denver, all readings are wrong there, (at first blush)

if below 1000 feet
the filter is clogged
or PFR leaks. (the 16v FPR moves everytime you move your right foot and after 20 years the insides of it get worn and can leak deep inside.)
or pump is weak?
if the shunt test passes the pump is ok.
if the filter is ok, and the shunt passes, the FPR is bad. (proven at this point)

i live on the beach. ie, sea level.
if the fpr leaked, why am i getting 30psi after almost 30minutes at key-on?
shunt-test? please elaborate?