[Richard L]

I assume your car is not using the OE BCV.

Please do one thing for me, disconnect the power to the BCV and tell me if you still gets high boost. If ths is the case, there may be may hose routing mistake. The HFS6 just highlighted a serious problem.

You might argue the boost controller is wrong properly. The ECU doesn't care what duty cycle % it pumps into the BCV as long as it reached the target boost.

Let me know what happen to the boost when you remove the BCV plug.