I thought the way the system operated was at a certain RPM (3-4,000) the valves opened. That way while you're in and around residential neighborhoods it's quiet and on the open road it could let loose with no input from the driver. The button was only used for manual "stimulation" of the exhaust tone at low RPM's. So with that being said, if you don’t hear a distinctive change in exhaust tone at a high RPM I think you should remove the PSE and send it to me.
