Engine Rattle under acceleration

[Kuhat]

starting a couple weeks ago I noticed some rattling when the engine revs up in my Camaro (02 LS1), it doesn't sound like metal against metal rattle and it only happens under harder acceleration, any thoughts on what it might be? I'm by no means a mechanic, but can't really take the car into the shop because its my only car.

[SOPES]

Cat. convertor rattle ? jack it up and tap on the exhaust with a rubber mallet.

[farmington]

detonation? using regular gas?

[SOPES]

Is the ses light on ? any performance issues ?

[WMCCjames]

Rod knock

[SOPES]

video ?

[Kuhat]

I might be able to post a video, if you can hear it. I dont think its rod knock, it sounds lower than that. No lights are on and there are no performance issues. I think I do have cat rattle but that happens at idle too, and that sounds more metallic than this rattle. I'll try and get a video on my drive home

[SOPES]

Yeah it sounds like cat then or even a heat shield. Rubber mallets are my best friend when diaging one of them

[Kuhat]

If that's it I'm glad its not something more serious

[SOPES]

Just keep in mind a cat rattle is ok for a while, it can break down from bouncing around and potentially plug your exhaust

[SOPES]

If thats not it let me know and I see your in royal oak and one of these nights when I make it to woodward I could stop by or meet you there

[Kuhat]

Awesome, thanks. I'm in Dearborn now actually, but I plan on going up to Woodward quite a bit this summer.

Here's a link to a video I took last night on the highway (mostly for the audio since you can't actually see anything)

https://docs.google.com/file/d/0B2r9...it?usp=sharing

[SOPES]

Sorry Chris I cant really hear anything in the video, I guess let me know when your heading out to woodward and we can meet up

[Kuhat]

Yea, I figured it was a long shot. Sounds good Mike, thanks.

[1BADAIR]

91+ octane?