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Discussion Starter #1
On my way home from work yesterday and noticed that there was a weird noise when I press on the gas pedal. Sounds a bit like marbles rattling in a small jar. Stopped the truck and put it in park and revved a few times and heard the noise again. No sound when I idle though. Anyone here experience this?

Thanks,

Kevin
 

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Man. I never heard about something like this. I had something similar but only when I floor it. It was the front passenger side fender vibrating and hitting the inner panel. Bit I think its something different.
 

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Discussion Starter #4
Gonna check all the pulleys later today. Went ahead and checked my muffler and it was good, so while I was under there I checked the heat shield as well for any vibrations and everything seemed intact. I only hear the rattling noise when I press on the gas. When I'm idling the noise stops. I put it in park and revved a few times and heard it again. Gonna try to figure it out this weekend.
 

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sounds like a failing catalytic converter.
 
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