Hey sorry for the late reply I have been really busy. 15 in hg is not idle it idles around 20-22 in hg which is normal. I have already replaced the PCV and n75 with spares I had laying around which I know are good, and I can now build and hold boost after replacing n75 but the fluctuations are...
Hey!
My 07 GTI has been having issues recently with boost. When it's around 15 in-hg it fluctuates from 15 down to 10 over and over and you can feel it and hear it. It stops as soon as you push past 15 in-hg. also doesnt hit boost as fast and only gets up to 8-10 psi if I really step on it...