Saki GT

This comes from under the car, not from the engine bay. It is a rattle when the throttle is just blipped, basically when the engine is shaking the most.

I've check the exhaust and everything seems tight up to the header - not sure what this could be. Any ideas?

http://www.youtube.com/watch?v=rFHD4g8VsMA

UPDATE

Took a second video - this is under the cat/transmission. I can't tell if it might be coming from the drivetrain now...

Does this clarify anything for the experts?


http://www.youtube.com/watch?v=eIxk2seYvwU

Mr2000

Any aftermarket suspension parts? Recently done anything to the tranny? Have you checked the under carriage for a rock kicked up and trapped?

Possibly something loose in the suspension that rattles when the car comes down in RPM.

Maybe something in the bell housing that could be jumping around as the shaft spins?

Or possibly a rock or a "missing" tool that was left or thrown up and trapped that could be jumping around.

Those are my best guesses

Saki GT

It happens with the car sitting still, I can go around and check the suspension but other than the rattle at idle/throttle input, there's nothing I can hear. Whatever it is I think its related to the engine vibrating - just not sure where its happening until I get a closer look at things.

It def sounds like its coming from teh cat area to the header, but there's a lot there that it could be, and its not constant, only when engine vibration is highest.

Mr2000

No exhaust smell? Maybe a long shot, but check the exhaust from the header to the rear of the car and see if it rattled loose somewhere. Could be just loose enough that it only rattles when the header is shaking a considerable amount.

Good luck with it

Not Sure

I had the same symptoms when my cat went bad - loose pieces rattling inside the cat.

SgtB

Check all the heat shield bolts.Hopefully it's not the cap from the secondary o2 rattling around inside the cat.

Billman250

Sound like a loose cat converter media to me. And I've heard many

Saki GT

Took a second video - this is under the cat/transmission. I can't tell if it might be coming from the drivetrain now...

Does this clarify anything for the experts?


http://www.youtube.com/watch?v=eIxk2seYvwU

Saki GT

Recent change was a transmission fluid change two weeks ago with new Amsoil, no evidence of leak though. Car drives fine.

SgtB

That's the catalyst bouncing around in the cat. You can take the five bolts out pretty easy and shake it. You don't have to take anything else loose, it just squeezes out..