Rattling/Buzzing exhaust sound...Any suggestions
#1
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The Basics:
2000 Trans AM WS6 A4
2800 vig stall
221/223 112 cam
Mac mids with cats, stock i-pipe, flowmaster, dual/dual tips
The issue:
between 2200 and 2450 rpms, I get this annoying metallic buzzing/rattling
noise from the back of my car near the muffler. It started when I had my flowmaster installed. After my cam install, it became worse because the cam made my exhaust even louder.
I went back to the muffler shop and they cut off the flowmaster and installed a new one. (I watch the entire time) Guess what, I still have the noise..
My first guess was a loose heat shield, but they seem pretty tight. I am going to jack up the back of my car and have someone rev it to the range of RPMS that creates the noise and poke around.
Anyone have this problem? Any suggestions. Thanks for the help!
2000 Trans AM WS6 A4
2800 vig stall
221/223 112 cam
Mac mids with cats, stock i-pipe, flowmaster, dual/dual tips
The issue:
between 2200 and 2450 rpms, I get this annoying metallic buzzing/rattling
![Guns](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_guns.gif)
I went back to the muffler shop and they cut off the flowmaster and installed a new one. (I watch the entire time) Guess what, I still have the noise..
![Huh](https://ls1tech.com/forums/images/smilies/LS1Tech/huh.gif)
My first guess was a loose heat shield, but they seem pretty tight. I am going to jack up the back of my car and have someone rev it to the range of RPMS that creates the noise and poke around.
Anyone have this problem? Any suggestions. Thanks for the help!
#2
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Originally Posted by RC_Y2KWS6TA
The Basics:
2000 Trans AM WS6 A4
2800 vig stall
221/223 112 cam
Mac mids with cats, stock i-pipe, flowmaster, dual/dual tips
The issue:
between 2200 and 2450 rpms, I get this annoying metallic buzzing/rattling
noise from the back of my car near the muffler. It started when I had my flowmaster installed. After my cam install, it became worse because the cam made my exhaust even louder.
I went back to the muffler shop and they cut off the flowmaster and installed a new one. (I watch the entire time) Guess what, I still have the noise..
My first guess was a loose heat shield, but they seem pretty tight. I am going to jack up the back of my car and have someone rev it to the range of RPMS that creates the noise and poke around.
Anyone have this problem? Any suggestions. Thanks for the help!
2000 Trans AM WS6 A4
2800 vig stall
221/223 112 cam
Mac mids with cats, stock i-pipe, flowmaster, dual/dual tips
The issue:
between 2200 and 2450 rpms, I get this annoying metallic buzzing/rattling
![Guns](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_guns.gif)
I went back to the muffler shop and they cut off the flowmaster and installed a new one. (I watch the entire time) Guess what, I still have the noise..
![Huh](https://ls1tech.com/forums/images/smilies/LS1Tech/huh.gif)
My first guess was a loose heat shield, but they seem pretty tight. I am going to jack up the back of my car and have someone rev it to the range of RPMS that creates the noise and poke around.
Anyone have this problem? Any suggestions. Thanks for the help!
![Cheers!!](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_cheers.gif)
#3
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Thanks. I will check the y-pipe and the i-pipe at the cross brace again. I crimped out a section of the cross brace where it was barely touching and making a noise. Maybe it still doesn't have enough clearance. I will probably take it off and drive around for a while to see if it stops. If it does, I will rig up some type of heat-resistant buffer between the metal peices.
Your right, one thing that is a pain in the a$$ about exhaust rattles, is that they echo through the system and its hard to pinpoint the where its coming from.
Your right, one thing that is a pain in the a$$ about exhaust rattles, is that they echo through the system and its hard to pinpoint the where its coming from.
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I had a similar problem that took me quite a while to solve. I was sure it was coming from the exhaust/heat sheilding somewhere. Took damn near all of it off and the noise was still there. The noise ended up being one of the springs on the bottom of the passenger seat resonating. Honestly I never thought I'd find it. I'm damn suprised I did, because it sounded like it was coming from much further back in the car. It's worth a check anyway.
Craig
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well I dont know if its any help., but when I put on my magnaflow catback, the over axle pipe kept trying to sit on the axle, and drop down in the back. so everytime I would run the car ,especially around 2000rpm, it would sound like a damn machine gun war inside my cabin. eventually I had to fab up a custom hanger braket for the over axle to get it to quit screwin around. biggest PITA catback I ever installed... had to do like 5 or 6 things to get it to sit where it's supposed to.
Brad
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Funny, i just heard a noise like that on my car today. It only happened when i first started her up, went away after a quick rev of the engine. I just installed a new Hooker catback a couple days, i'll have to investigate further if it does it again.
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I had the same sound...it was the where the y pipe met in the I pipe...i swore it was coming from the rear, but i was wrong. You have to have someone get under the car and then play around with different RPMs and you'll find it.
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Originally Posted by smokin' joe 00 ss
The stock 02 sensors have a loose sheild around the tip and will rattle also so you might want to check them too.