Hey so while I was driving around I looked down at my boost gauge and it was reading 30 inHg. I looked all over the engine bay to see if anything looked out of place. I can't find anything. Has anyone had this before? If so tell me what I should look for. Oh and when I press the accelerator pedal I reaches up to around 24 inHg. Also it's an AEM digital boost gauge.

 

Is is a mechanical or electric gauge? Mechanical has airline going into back of gauge. Electric has sensor that tells gauge what to display (no airline in back of gauge, only wires).

 

I had similar issue. my gauge is mechanical

 

It's electrical. I'm thinking the sensor just went out of calibration because I was reading 8 inHg when the engine was off