Factory Active exhaust muffles cold start

[Mustangman2016]

This is a repost because the last thread I posted went very off topic very fast without a real answer so I’m hoping someone can help. So I’ve had my 2024 GT with factory active exhaust for like 6 months now and I’m just realizing that it muffles the cold starts. Basically what it does is even though the valves are open when I press start, they close for a second to muffle the loud part of the startup and then they open again. I have it on video and I’m posting it with this. Does anyone know if there’s a way to stop that from happening without clipping the valves open? I really do like having the functionality of the exhaust but I hate that I can’t get real cold starts. Please note that I like loud cold starts and that’s all I want from this.

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[Pmamba]

That kind of sounds like mine when it’s in quiet mode in the morning. Not sure what people replies with already. Did you check to see if you have it on or scheduled? Maybe there is a way to factory reset settings for that?

 

[Mustangman2016]

That kind of sounds like mine when it’s in quiet mode in the morning. Not sure what people replies with already. Did you check to see if you have it on or scheduled? Maybe there is a way to factory reset settings for that?

I definitely don’t have it scheduled but I’ll see if I can reset settings to see if that fixes it thanks. I’ll check in after I try that.

 

[Lightningwings]

Yes, @Stang24 has a video on his youtube that shows you how to do it. You need to start the car in Accessory Mode, switch to Track Exhaust. Then fully start the car. You have to be in the vehicle to do this, you can't accomplish this by remote start. Check out the short video below:

Cold Start 2024 Mustang in Track Mode

 

[Coosawjack]

That ain't exactly "quiet"......sounds pretty damn good to me!!

 

[Mustangman2016]

Yes, @Stang24 has a video on his youtube that shows you how to do it. You need to start the car in Accessory Mode, switch to Track Exhaust. Then fully start the car. You have to be in the vehicle to do this, you can't accomplish this by remote start. Check out the short video below:

Cold Start 2024 Mustang in Track Mode

So I did eventually end up trying that back I got the same result this time I got a better video. That’s after having put the car in accessory mode and choosing track exhaust.

 

[Eurasianman]

To not go off topic... open the valves (i.e. put it in track mode) and just unplug the valves on the muffler or find the fuse. Once again, I'd be surprised if there was that much difference in that 1 second that the valve closes and then reopens.

 

[Mustangman2016]

Hey everyone, I know it’s been a while but I just wanted to update this for anyone that may have had the same issue with this as me, I ended up unplugging the valves, started it, plugged them back in then unplugged the battery. After I did that now it starts with them wide open like it’s supposed to. I still have quiet mode if I need it but I can also get cold starts.
P.S. for those wondering if it made a difference here is a video of it starting now and you can compare that with the first video in this thread

 

[Mustangman2016]

Hey everyone, I know it’s been a while but I just wanted to update this for anyone that may have had the same issue with this as me, I ended up unplugging the valves, started it, plugged them back in then unplugged the battery. After I did that now it starts with them wide open like it’s supposed to. I still have quiet mode if I need it but I can also get cold starts.
P.S. for those wondering if it made a difference here is a video of it starting now and you can compare that with the first video in this thread

 

[missiondrago1]

Hey everyone, I know it’s been a while but I just wanted to update this for anyone that may have had the same issue with this as me, I ended up unplugging the valves, started it, plugged them back in then unplugged the battery. After I did that now it starts with them wide open like it’s supposed to. I still have quiet mode if I need it but I can also get cold starts.
P.S. for those wondering if it made a difference here is a video of it starting now and you can compare that with the first video in this thread

Thank you for this post. Ive noticed that my s550 GT has been doing this too recently now that its cold winter. Not sure if the low temp has anything to do with the momentary valve close to prevent loud cold starts or if I just didnt notice during summer bc its usually muffled anyways (weak start due to high temps).

Anyways, I want to try your solution where you "ended up unplugging the valves, started it, plugged them back in then unplugged the battery". But want to clarify if you unplugged the battery while the car was on (which doesnt make sense to me) in the final step? Also can you explain more on what this method does and why it works? Does is default it always to track mode and does it still allow you to switch off to quiet, etc.?

 

[Mustangman2016]

Yeah so after unplugging the valves, I started the car, and turned it off. Then I plugged the valves back in. After that I noticed the car wasn’t seeing the valves even plugged in, so I turned off the car again and unplugged the battery and plugged it back in. After that the valves worked as normal without the muffling on starts. Then after a few weeks it started muffling the starts again, it’s been too cold for me to really look into it but I think it has to do with the bcm recall killing my battery because It started doing it again after that happened

.

Thank you for this post. Ive noticed that my s550 GT has been doing this too recently now that its cold winter. Not sure if the low temp has anything to do with the momentary valve close to prevent loud cold starts or if I just didnt notice during summer bc its usually muffled anyways (weak start due to high temps).

Anyways, I want to try your solution where you "ended up unplugging the valves, started it, plugged them back in then unplugged the battery". But want to clarify if you unplugged the battery while the car was on (which doesnt make sense to me) in the final step? Also can you explain more on what this method does and why it works? Does is default it always to track mode and does it still allow you to switch off to quiet, etc.?

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[DrewCieslewicz]

Hey everyone, I know it’s been a while but I just wanted to update this for anyone that may have had the same issue with this as me, I ended up unplugging the valves, started it, plugged them back in then unplugged the battery. After I did that now it starts with them wide open like it’s supposed to. I still have quiet mode if I need it but I can also get cold starts.
P.S. for those wondering if it made a difference here is a video of it starting now and you can compare that with the first video in this thread

This isn't working for me, anyone have any other fixes or is this the only way?
UPDATE: After starting it a second time, it now works like the video shows! Thank you!
2nd Update: Will revert to muffling startups after enabling quiet mode during trip at any time.

 

[Ducatti20]

My uneducated guess is that the servo motors are "homing" on initial power-up and that requires going to the closed position, then they go to the open position (unless in quiet mode).
I work in an industry with a LOT of servo actuated components and when they are powered off and powered back on they need to initialize to find their location (servo motors work off of voltage feedback/resistance to determine coordinates). So going to a "hard stop" or position where they meet resistance would tell the motor where "zero" is, then they actuate to their designated coordinates or servo location.

 

[DrewCieslewicz]

Thanks for your response. Do you think there’s anyway to not allow that initial startup check to occur?

 

[Ducatti20]

Probably not without software manipulation. I mean it would be easy for Ford to program the start sequence to initialize the servo's before engaging the starter motor but my guess is they didn't do that as it would cause a momentary delay in cranking.
Again I'm just guessing here but the behavior in the video leads me to believe I'm right.
It probably has to do with the quiet start option more than anything, even if you aren't using it the servo's are cycling to get to correct location.

I'll take a look at how mine behave today with a few scenario's I have in mind, but likely this is hard coded in the servo motor's themselves behavior.

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