I don't recall this happening before. Just saw it on my way in. Flutters between 21-23 psi or so. Haven't pulled a log yet, so not sure what the car is actually seeing off the omnibar.
Thoughts? Just the way mechanical gauges are sometimes? Wrong boost source? I'm t'ed off the manifold using the same line that goes to the FPR.
In anycase, there was no mechanical or drivability issue that I perceived. Just the needle having a spasm at WoT boost.