As others said, just go back to stock diverter valves and see if the problem is fixed.
If the problem is fixed then you know your aftermarket part is defective.
To fix it depends on whats wrong with it. It could be several things.
You can run stock diverter valves with FBO, its not a big deal, you will still make the same power and everything.
Also...
If you get a log and post it up of your WG duty cycle that will explain everything.
Along with boost RPM, TPS, ignition, ignition correction.
Just to reiterate, go back to stock DV to see if the problem is fixed. Then contact AA to see how to fix the defective part or send it back.
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