I currently am using an autometer gauge and it's hooked into a vacuum line off my intake manifold. I know it reads my boost wrong. Today in 3rd I was boosting at 8 psi. Sometimes it says 6.5 in second but today it was between 7 and 7.5. I have no aftermarket boost control and I only have 166 whp so I know my car is at stock boost. My boost gauge just sucks. I'm installing a mbc very soon with the dsm afc and I want to boost at 9 psi. I just don't want my gauge to read 9 psi but really only be at 7 or 7.5 psi. Is this common and something I just have to deal with? Should I try buying a different gauge? Any feedback would be much appreciated. Thanks.