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Old 10-08-2013, 01:21 PM   #1
Fla904
 
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Muffler delete sound question

I had a muffler delete because I don't like super loud custom exhaust but I like a little deeper sound. It sounds great but I notice that when I'm not on the gas hard or when it's just cruising it goes from a deep pitch to a v6 sounding pitch what's with that? Sounds weird.
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Old 10-08-2013, 01:39 PM   #2
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I have muffler deletes on my 1LE, I dont get the high pitched V6 sound at all on mine.
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Old 10-08-2013, 01:41 PM   #3
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I've got an SS and can't say I've noticed it with my delete either
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Old 10-08-2013, 01:42 PM   #4
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I have the muffler delete and don't get that either. I do know that when you take your foot off the gas, the ECM cuts the fuel to the engine and if your going down an incline, you will get a decel pop. I love it!
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Old 10-08-2013, 01:47 PM   #5
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Do you have L99 or LS3?
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Old 10-08-2013, 02:06 PM   #6
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Quote:
Originally Posted by slick rick View Post
Do you have L99 or LS3?
I have the L99, its not super noticeable tho almost just sounds like the pitch is going up and down like when its on cruise control for example. hard to explain its not one steady tone like it should be.
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Old 10-08-2013, 02:13 PM   #7
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Kinda sounds like the AFM may be kicking on to me?
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Old 10-08-2013, 02:15 PM   #8
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Kinda sounds like the AFM may be kicking on to me?
This.

Your AFM is kicking in giving it two separate exhaust notes. If you shift the car with the paddles, it is less noticeable.
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Old 10-08-2013, 02:20 PM   #9
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That makes sense kinda what I figured ill use the paddle shifters more often or is there a way to turn off the afm function?
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Old 10-08-2013, 02:33 PM   #10
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http://www.camaro5.com/forums/showthread.php?t=283175


Get a Range AFM disabler. Plugs directly into your OBD-II port. Essentially a plug and play system.
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Old 10-08-2013, 02:57 PM   #11
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The only thing I have from the muffler delete is a low drone which I kind of like.
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Old 10-08-2013, 03:14 PM   #12
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Quote:
Originally Posted by 40years View Post
I have the muffler delete and don't get that either. I do know that when you take your foot off the gas, the ECM cuts the fuel to the engine and if your going down an incline, you will get a decel pop. I love it!
Seems I get a decel pop anytime between 1200 and 2000 rpm if I down shift. I take it that this is normal? I also wish my sound was deeper but that'll come later I guess.

Sent from the road.
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Old 10-08-2013, 03:30 PM   #13
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Definitely sounds like AFM kicking in to me. You can tune it out, or try out that Range device.

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Old 10-08-2013, 05:00 PM   #14
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I think what your hearing is AFM kicking in. You can disable it by tuning your car ( voids warranty) or you can get a Range device. Also you could use this method put your car in S mode downshift with steering wheel paddles to 1st than up to 2nd and then down to 1st and 2nd again and then first; All this while stationary with your foot on the brake this should turn of AFM put once you get out of M mode you have to repeat it to get it to disable. I am not sure about this method but I heard it works.
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