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Why Is My Pse Quiet Switch No Longer Working?

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The following facts are relevant:

1) I have an '02 Targa;

2) I have PSE with full electronics;

3) I have the "bent leg" hack done so that the PSE doesn't cut out at any speed; :D

4) Everything worked perfectly well following the hack (for at least a month), meaning that the default loud worked with no quiet spots, I could hit the button on the dash to mute the exhaust as needed, and PSM I continues to work;

5) Now, the default loud still works (thank god), the button on the dash appears to function correctly (at least the light illuminates upon activation) and PSM I still works, but the exhaust no longer mutes when the dash button is activated.

Any ideas? Thanks.

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It could be many things but I would start with the grey-colored relay that this above the positive black cover (used for jump starting) in the engine compartment. You will see a two-wire brownish connector that plugs into the grey relay.

From the grey relay, you will also see a 90 degree rubber tube that connect to a hard plastic tube and two more coming out of the other end. This is the vacuum system for the sport exhaust flaps.

First, have someone press the sport exhaust switch and see if you can hear that grey relay click. The click is very faint so listen closely. If you can hear it, it's good. Then it may be a problem with the vacuum lines. If you don't hear it, then:

I would disconnect the two-wire brownish connector and use a volt meter to see if there is current. (BE CAREFUL not to cross the two volt meter test wires when you test it.) With one person checking the current, have another person press the sport exhaust switch. If you have current, then you most likely need a new grey relay. Simple install/fix.

The other problem could be vacuum related. If the electrical part is okay, you may have a vacuum leak and will have to trace the black tubes and vacuum check the lines.

Check the vacuum flaps that are connected onto the mufflers and see that they move freely by hand and without binding.

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