I just installed stillen stage 3 and an aem digital boost gauge. When I get on the gas the gauge goes to 5 psi for a second then settles back around 0 until I get off the gas. Does this sound normal? From what I remember my friends turbo boost gauge (needle type) showed boost the whole time he was on the gas. I wasn't sure if with the digital aem gauge or s/c it's different.