Exhaust resonance - standard
Thread Starter
Cruising
Joined: Sep 2003
Posts: 12
Likes: 0
From: Fallbrook CA
Exhaust resonance - standard
Hi,
I have a 50th Anniversary Coupe - no mods at all - and I get a resonance in the exhaust system when moving slowly (I know, don't do that :) ) in traffic or just pulling away. Happens exactly at 900 rpm when pulling. I have 9000 miles on it because I love driving it :D
My dealer says "they all do this - it's normal" and I think he's full of it.
Anyone care to comment or make suggestions.
[Modified by rynd2it, 7:46 AM 9/7/2003]
I have a 50th Anniversary Coupe - no mods at all - and I get a resonance in the exhaust system when moving slowly (I know, don't do that :) ) in traffic or just pulling away. Happens exactly at 900 rpm when pulling. I have 9000 miles on it because I love driving it :D
My dealer says "they all do this - it's normal" and I think he's full of it.
Anyone care to comment or make suggestions.
[Modified by rynd2it, 7:46 AM 9/7/2003]
Pro
Joined: Jun 2002
Posts: 726
Likes: 45
From: Marquette MI
Re: Exhaust resonance - standard (rynd2it)
Sounds like the "can of marbles" rattle that we get with manual transmissions when starting from a stop. Did you play the video you got with your Vette? It mentions this sound and I think has an audio of it. I know - a $50,000 car shouln't make such a sound.
Thread Starter
Cruising
Joined: Sep 2003
Posts: 12
Likes: 0
From: Fallbrook CA
Re: Exhaust resonance - standard (Bob Chapman)
Hi Bob,
Thanks for the suggestion, I don't recall it on a video I think we got a CD. I'll check it out. I suppose if it is a general fault I can always upgrade to a Bola or Corsa :D
Thanks for the suggestion, I don't recall it on a video I think we got a CD. I'll check it out. I suppose if it is a general fault I can always upgrade to a Bola or Corsa :D
Thread Starter
Cruising
Joined: Sep 2003
Posts: 12
Likes: 0
From: Fallbrook CA
Re: Exhaust resonance - standard (rynd2it)
Hi Bob,
I ran the CD - no relevant comment that I could find. I'm taking the car in on Wednesday so I'd appreciate any help from anyone. The dealer already fitted a "dynamic balancer" but it made no difference. Their documentation quoted a 70% improvement :rolleyes: so clearly they thought somethign was wrong.
It's really annoying when pulling away - nasty little rasp or rattle, like a loose baffle on older systems
Thanks
I ran the CD - no relevant comment that I could find. I'm taking the car in on Wednesday so I'd appreciate any help from anyone. The dealer already fitted a "dynamic balancer" but it made no difference. Their documentation quoted a 70% improvement :rolleyes: so clearly they thought somethign was wrong.
It's really annoying when pulling away - nasty little rasp or rattle, like a loose baffle on older systems
Thanks
Thread Starter
Cruising
Joined: Sep 2003
Posts: 12
Likes: 0
From: Fallbrook CA
Re: Exhaust resonance - standard (Dave68)
Thanks Dave,
I guess I'm going to have to live with it.
Keep a look out for me - I commute from Fallbrook to Mira Mesa every day in it
:cheers:
I guess I'm going to have to live with it.
Keep a look out for me - I commute from Fallbrook to Mira Mesa every day in it
:cheers:
Team Owner
Joined: May 2003
Posts: 23,480
Likes: 9
From: East Meadow NY
St. Jude Donor '12
Re: Exhaust resonance - standard (rynd2it)
I have a 50th A4 Convertible. I have the same annoying resonance. I noticed it while going up a fairly steep hill at around 40mph. It annoyed me enough that I dropped the Auto into 3rd, and kept going.
The noise just reinforced my thoughts of getting more gear. ;)
[Modified by chaase, 7:39 PM 9/8/2003]
The noise just reinforced my thoughts of getting more gear. ;)
[Modified by chaase, 7:39 PM 9/8/2003]
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Team Owner
Joined: May 2003
Posts: 23,480
Likes: 9
From: East Meadow NY
St. Jude Donor '12
Re: Exhaust resonance - standard (WWK888)
I have had the car for just over 4months and I have been making a mental list of things to do....The list grows, and the bank account shrinks!! :)
[Modified by chaase, 3:27 PM 9/8/2003]
[Modified by chaase, 3:27 PM 9/8/2003]
Drifting
Joined: Jul 2000
Posts: 1,421
Likes: 0
From: Arlington, Texas
Re: Exhaust resonance - standard (Bob Chapman)
Sounds like the "can of marbles" rattle that we get with manual transmissions when starting from a stop. Did you play the video you got with your Vette? It mentions this sound and I think has an audio of it. I know - a $50,000 car shouln't make such a sound.
Team Owner
Joined: Sep 2001
Posts: 23,283
Likes: 906
From: Lake Elsinore, CA
Re: Exhaust resonance - standard (USA Muscle)
Sounds like the "can of marbles" rattle that we get with manual transmissions when starting from a stop.
Well I get that sound in my 6 spd... but he has an auto ! Shouldn't be the same sound I'd think !
Well I get that sound in my 6 spd... but he has an auto ! Shouldn't be the same sound I'd think !
:leaving:
Thread Starter
Cruising
Joined: Sep 2003
Posts: 12
Likes: 0
From: Fallbrook CA
Re: Exhaust resonance - standard (Patches)
Well, we got an audio CD with the car as a 7-minute instructional manual - actually played it sitting in the car, very helpful. It didn't mention the resonance.
We also got a promotional CD and that didn't mention it either :rofl:
We also got a video and tonight I'm going to sit down and watch it very carefully :)
Then we'll see what Wednesday brings
Thanks everyone
We also got a promotional CD and that didn't mention it either :rofl:
We also got a video and tonight I'm going to sit down and watch it very carefully :)
Then we'll see what Wednesday brings
Thanks everyone
Former Vendor
Joined: Apr 2001
Posts: 10,976
Likes: 21
From: FL
St. Jude Donor '13
Re: Exhaust resonance - standard (rynd2it)
The noise that you are hearing on the A4 is due to engine torsional loads being transmitted through the exhaust system,causing the tailpipes to resonate (like a guitar string) due to the stiffness of the exhaust.You will notice that the noise is worse with the A/C on.It is not only on the 2003,but all years,some worse than others.Some dont have it at all.
GM has not addressed this and does not have a fix for it.Unfortunately,as another member stated,the only way to get rid of it is to install an aftermarket exhaust.
The noise addressed in the video or CD pertains to the tranny noise in the M6...
[Modified by C-5 TECH, 6:56 PM 9/8/2003]
GM has not addressed this and does not have a fix for it.Unfortunately,as another member stated,the only way to get rid of it is to install an aftermarket exhaust.
The noise addressed in the video or CD pertains to the tranny noise in the M6...
[Modified by C-5 TECH, 6:56 PM 9/8/2003]
Race Director
Joined: Dec 2000
Posts: 19,304
Likes: 85
From: San Diego CA
Re: Exhaust resonance - standard (rynd2it)
Oops, sorry David. I guess I didn't catch the fact that you have an auto-tranny car. I do drive briefly through Mira Mesa on my way to Scripps Ranch. In fact, I was on 15 South when a rock made a good-sized chip in my windshield a while back. Fortunately, my insurance company cheerfully authorized its replacement soon after.
Look for me as well; you won't miss the Borla Stinger quad-tips!
Dave :cheers:
Look for me as well; you won't miss the Borla Stinger quad-tips!
Dave :cheers:
