So today i was driving and i noticed my boost would only 14 psi every single time under full throttle, normally it would spike up to 20 psi and then taper off, but this time it would not go past 14 psi no matter what i did. When i pulled over i shut of the car for about 30 minutes and started driving again and it was back to normal. This is the second time this has happened, the first time it happened after doing a boost leak test. What could be the problem? The only thing my research has led me too is the "n75" valve. How does it even look like? Where is it even located?

 

The N75 is located next to the turbo and attached to the inlet pipe, below the pancake valve. It will have a some vacuums lines attached and a connector on top.

You could probably find a way to check its functionality if you do a quick search.

Have fun though, it is not fun removing it for the first time.

 

You can unplug the electrical connector to the N75 and check the resistance across the 2 pins on the N75. Should be something like 22-32 ohms.

Could also be a boost leak. Is your diverter valve upgraded?

 

Yes the dv is upgraded.

 

Have you performed a boost leak test?

 

Not recently, but I hear air releasing after 14 psi.