I tried looking around and couldn't find much of what was happening to my FD. so I drove it two days ago boost gauge was reading fine going from 0 to.5 KPa at max boost. today when I was driving it it wouldn't even reach 0 KPA until about 4500 RPM and would only get to about .1 KPA. I have a Defi boost gauge. below is the gauge and a video of what it is doing

 

Check all the rubber couplings from the turbo outlet to the intake elbow. One or more are loose, disconnected, or torn.

 

I looked at all of them and none are damaged or loose. From what I can tell the motor is good it doesn't feel down on power. but at the same time, it has a lot of blowby. I went to check the catch can and it was full. recently emptied it when I did my oil about 2 weeks ago.

 

Pic of your setup?
it’s not down on power but the gauge reads low? Maybe try a different gauge for quick troubleshooting.

 

Yeah ill have to get another gauge to see if that is it then.

 

so you need to figure out if the gauge is low because its bad or if its reading low because boost is actually low.

 

It seems like there might be an issue with the boost gauge or the boost system in your FD. Check for potential leaks in the boost hoses, inspect the wastegate, and ensure the vacuum lines are secure.

 

Does the car feel any different as in no power at all? I would almost say it may be something with the gauge because it looks like you never even reach no vacuum. You should be able to give it a bit of throttle and hit "0" at least so unless you are driving with very light throttle and not trying to get into boost there seems to be something up with that aspect. It sounds like the turbo is running so you should be seeing positive pressure even if a couple pounds. I would think you would hear a leak that large if you aren't getting anything to the manifold.