So I have two boostauSo i know that its just the gauge thats reading wrong just to start. The gauge that works is an analog Defi and the one thats wrong is a really terrible greddy profec e01 that was on the car when I got it. its like a little computer. Anywho I've checked all the vacuum lines under the hood or at least all I can find. Any ideas of where else I should check like where would you put the pressure sensor. Just a heads up its reading between 5 and 7 psi low at any given point.