Well im using a GReddy Profec B and GReddy boost gauge. I set mine to 1 bar (15 psi) and took it for a test drive and my boost gauge was fluttering around +-2 psi. Anyone know what could be causing this and how i can correct it? I also have a tial wastegate and it doesnt flutter on 9 psi. any info would be greatly appreciated, thanx.

 

did u instal the orfice that came with the greddy boost gauge...it goes in the vacume line.