Just got my boost gauge installed the other day and I've tapped into where it seems like most have is the vacuum tube that is parallel coming from just past the throttle body. I noticed that the needle will flutter when its showing vacuum. This is a mechanical gauge. Has anyone found a good solution for solving this problem?

 

I also have a mechanical boost gauge, no issues. tied it in to the line pictured below (not my pic, but the same spot I did). Over a year with no issues.

 

Yeah mine is having some flutter. Wonder if it’s the gauge itself. I’m tapped into the same location but might need to check and make sure there aren’t any leaks.

 

What T are you using?

 

You could install a restrictor in the vacuum line for the gauge. Its basically a small orifice plate that dampens out pressure pulsations in the vacuum line. Usually you'll see flutter at WOT and high boost caused by turbulence past the throttle plate. Since you are seeing flutter at vacuum, I would make sure you don't have any leaks first.