Exhaust baffles - fuse?

Gnomad

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2021 Jeep 392 XR / 2019 Corvette Z06/ 2004 Corvette Z06
Hi…

So I got to wondering, after my teen daughter turned off the exhaust button for the 100th time today.

On my C7 Corvette, there are multiple settings for the exhaust baffles, depending on driving mode. However, there is a specific fuse that can be removed which then leaves the baffles always open. My fuse is removed. 😁

I was wondering if anyone knew if this was possible on the 392 and, if so, which fuse?

Praying there is a way so that I can troll my daughter, who thinks that she’s the center of the universe, always wanting control of the radio, windows, and climate controls. It’ll drive her crazy if she can’t turn off my exhaust. Haha
 
I was wondering if anyone knew if this was possible on the 392 and, if so, which fuse?

Check the fuse panel for something labeled "exhaust", "performance exhaust", "exhaust baffles" or something similar.....
 
Check the fuse panel for something labeled "exhaust", "performance exhaust", "exhaust baffles" or something similar.....

Doh…not sure why I didn’t think of that, thx! More coffee!!

So I found this…
215EC5E9-18B0-4344-8BB7-CA03EBABDEAA.jpeg

Can’t find much on Google. A few topics about it in challenger/charger forums, and how to avoid throwing codes. 😬. Didn’t like the sound of that!

Then realized I wouldn’t be able to close the baffles on the freeway, where the drone sometimes gets to me.

So I’m leaning towards this to troll my teen daughter instead. 😉

7292081F-2594-4A94-B390-7FB829DFE310.png
 
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So the question is....how is the system set up? Does vacuum on the valve make them go to loud or quiet mode?
Is the vacuum solenoid open or closed when energized?
Easy way to find answer would be just to pull that fuse and see if it goes quiet or loud.

Other way to bypass would be to bypass solenoid actuated valve and hook vacuum line directly to manifold vacuum.
Or disconnect and cap vacuum line if you wanted no vacuum.

Either of these would lock it into one mode.
 
So the question is....how is the system set up? Does vacuum on the valve make them go to loud or quiet mode?
Is the vacuum solenoid open or closed when energized?
Easy way to find answer would be just to pull that fuse and see if it goes quiet or loud.

Other way to bypass would be to bypass solenoid actuated valve and hook vacuum line directly to manifold vacuum.
Or disconnect and cap vacuum line if you wanted no vacuum.

Either of these would lock it into one mode.

So I’m not mechanical inclined at all, unless I can follow along to a YouTube video. 😉

However, the charger/challenger threads I was reading, after making my initial post, did mention that the default potion for the baffles without the fuse is closed. In the C7 vette it’s open, simple.

Anyway, the workaround is to start the car cold, then pull the fuse within a few seconds. It then stays open, but will also often throw a code. I stopped reading after that haha.

Maybe all moot anyway since they weren’t specifically talking about Jeeps.

I did come across one 392 Jeep topic from a guy whos baffles wouldn’t open and the replies were about the vacuum line, but that’s all above my pay grade. 😉
 
The baffles are vacuum actuated but there still has to be an electrical circuit involved. can't hurt to pull that fuse and see.
 
The baffles are vacuum actuated but there still has to be an electrical circuit involved. can't hurt to pull that fuse and see.
I'm guessing a solenoid that controls vacuum flow to the valves. Why they didn't just use electric actuators, I don't know.
 
So, for the sake of research, I pulled the F62 fuse. Started vehicle. It was in loud mode. Light was on exhaust button. Pressed button and light went out and it said performance exhaust off on dash, but stayed in loud mode. Further presses of button did not result in button lighting up and it continued to say performance exhaust off. Stayed in loud mode the whole time, so if you are looking to disable the quiet exhaust, this could be your answer. Funny that the light on exhaust button was on when I started it, but light would not come back on with further presses.

Also decided the check fuses, only a couple were not fully seated, but those were close, so no problems there.

So if you want to drive your daughter insane, pull the f62 fuse and watch the fireworks :). I would make sure you have it in loud mode before pulling fuse, since mine was in loud mode when I pulled the fuse, but probably doesn't matter unless the solenoid does not move from quiet to loud without some input.

Only saying this since you stated not mechanically inclined......you probably already know this...

Have it in loud mode. Shut vehicle off. Pull F62 fuse. Done........should be locked in loud mode.
 
I’m thinking the default is loud mode (exhaust valves open). I say this because when you start the initial sound is full open (loud mode) until there is enough vacuum pressure to keep the bypass valves closed and go into “quite” mode if Perfomance Exhaust is selected OFF. Kinda makes sense that valves fail spring loaded open. Vacuum pressure must keep them closed but as airflow reaches “high engine speeds and loads” then they “are commanded open without notification.” It might be that the airflow reaches a level where the bypass is opened by the pneumatic forces. Either way I love it, makes a trip to Home Depot sound like the Indy500.
 
So, for the sake of research, I pulled the F62 fuse. Started vehicle. It was in loud mode. Light was on exhaust button. Pressed button and light went out and it said performance exhaust off on dash, but stayed in loud mode. Further presses of button did not result in button lighting up and it continued to say performance exhaust off. Stayed in loud mode the whole time, so if you are looking to disable the quiet exhaust, this could be your answer. Funny that the light on exhaust button was on when I started it, but light would not come back on with further presses.

Also decided the check fuses, only a couple were not fully seated, but those were close, so no problems there.

So if you want to drive your daughter insane, pull the f62 fuse and watch the fireworks :). I would make sure you have it in loud mode before pulling fuse, since mine was in loud mode when I pulled the fuse, but probably doesn't matter unless the solenoid does not move from quiet to loud without some input.

Only saying this since you stated not mechanically inclined......you probably already know this...

Have it in loud mode. Shut vehicle off. Pull F62 fuse. Done........should be locked in loud mode.

You are my hero! Thanks for testing this out. I’m a big fan of “don’t fix it if it ain’t broke” so I started getting a bit nervous, what with a lot of the strange electrical gremlin messages I used to see because of the AUX battery in my old JLUR.

I even got a bit nervous installing a Tazer into my 392 haha

Thx again! Oh and the teen princess doesn’t thank you. 🤣
 
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