vibrating noise...

[Camaro Dom]

Re: vibrating noise...

the muffler may not be loose, but it's probably bouncing on the axle like mine does.. they're not gonna see that if they put it on a lift cuz the axle drops down when its off the ground. go with ramps and have a welder and a sawzall ready. just cut the hangers off and pull it up closer to the body. just look really good cuz there should be little marks to show where its bouncing on...

[camaro_dakota]

Re: vibrating noise...

I have the same issue on my 98 bird and I have had the cat replaced and the exhaust checked out.... I have replaced the o2 sensors and had the car on a lift with the suspension compressed.... you can hear the rattle towards where the y-pipe is... everything is stock on the car...... no heatshielding is even close to touching it....

[Sean_99_3.8]

Re: vibrating noise...

hmmmm... that might be why mine is making a rattling sound
i dont know why it started doing it a little after i put my cat back on

[Red99L36]

Re: vibrating noise...

well while u guys r talking about it, im gonna jump on the band wagon too...lol... mines doing the same...and its even causing my car to to be jerky, jumpy while im letting off of the accelerator...also, mine vibrates but it's the little metal piece on the end of my oxygen sensor wire...ive learned to deal with it....my car shuts off while im driving it too...have no idea what thats about...i thought it was me not getting enough fuel but i have a 255lph fuel pump and the cars running rich so wouldnt that mean its getting plenty of fuel?

[Red99L36]

Re: vibrating noise...

or can a clogged cat cause the car to shut off suddenly with no warning?

[96fbody]

Re: vibrating noise...

well. i also have this problem, and ive checked to make sure that it is not hitting anything and everything is tight, and it is, but i dont know much about the condition of the cat cause i just got the car. and it is only at low rpm, and when i step on it. not only does it rattle, but it gets EXTREMELY raspy, like ricey raspy. its nasty. any suggestions. sorry for the long post.

[Cammy98]

Re: vibrating noise...

You know I had the same problem. At really high RPM near the redline its get really ricer raspy. Totally know whut you mean. Well as I was driving back from church, just driving normally, my car all of a sudden got this deep roar and just got REALLY loud.

I look under the car and found this:


So dont ignore the rattling. Well I dont know if this was a warning sign or anything but yah. Gotta get that fixed with some clamps for something.

[Jhonathan_W]

Re: vibrating noise...

Had the same problem. GM replaced my cat for free.

[96fbody]

Re: vibrating noise...

You know I had the same problem. At really high RPM near the redline its get really ricer raspy. Totally know whut you mean. Well as I was driving back from church, just driving normally, my car all of a sudden got this deep roar and just got REALLY loud.

I look under the car and found this:


So dont ignore the rattling. Well I dont know if this was a warning sign or anything but yah. Gotta get that fixed with some clamps for something.

thats ****ing hilarious.