I just noticed my boost gauge is only showing 2lbs of boost . The vacuum reading is accurate so I'm wondering what's going on . It still feels like I have full boost which is usually 15psi . I have a 17%sc pully and 2% crank . Is it possible to lose 13lbs of boost and selling feel like it's ok .

 

Is that 2lbs under WOT? If that's the case, your gauge is not accurate or your gauge setup is faulty.

 

What type of tubing are you using? It could be possible the tubing is "blowing off" during full boost...

 

I just check using car scanner app and it shows 14lbs but it says calculated boost so I used torque and it shows the same so if they're accurate its either my gauge or the vac line to the gauge .

 

I found the issue . There's a small filter in the vacuum line to the electronic part that was partially plugged .