Still Having Boost Issues 5 months later

[EJ_GS-T]

Let me start off by saying I have used my leak tester kit(found a major leak on my BOV flang weld, now fixed) their is still a "very small" leak on the throttle body elbow but before I pull it off I thought get your feedback.

As I posted awhile back the problem is that when my car reaches around 10 psi it struggles to build boost above that point bouncing around between 16 and 10 pounds (VERY unstable) boost leak right?

This is what has me confused:
I drive the car sometimes and it works fine, boost stays where I have the EVC set perfectly car pulls like a train. I go in the house for an hour hop back in the car and the problem is back.

What should I do:
Is this just a simple boost leak and my EVC's fuzzy logic going haywire?
Is this a wastegate problem?

I have have tried a different BOV and just got the car back after having 2 valves replaced and the problem is still there.

This has been happening all summer, Please give me some advice on what I should look for even if you just have a theory, I am so fed up with this. I need to try something.
Thanks, Eric

 

[my_gst95]

EVC is an electronic controller right? Perhaps something is up with the install and or a wire is exposed. Sounds electrical to me if its spuradic. But fix the TB elbow leak first and if that doesn't work and you have no leaks anywhere else...check the wires on the EVC.

just a thought.

my_gst95