Uhh Im pretty sure that the wastegate opens with a PRESSURE line. Thats why your vaccuum source is on the hot piping where there is pressure. All the boost controller does is sit between the hot pipe source, and your wastegate and modulates the pressure that teh wastegate sees.
Now, my profec type-s is hooked up like so.
-T off the FPR, line goes to unit inside the car
-Line off hot pipe to boot solenoid (in)
-Line off solenoid(out) to wastegate.
Should work
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