Another rattling problem

[Baron Von Buick]

Once again I'm having yet another problem with the good ole Regal. Ok, when i hit the gas hard i hear a rattling noise, don't know where its coming from but i can hear it clearly, now when i hit the gas at a normal accelaration, i either dont hear it or it doesn't rattle. Any idea what this could be?

Thank You once again,
Patrick

 

[fc227]

Check your engine mounts. One many be broken.

 

[b4black]

Check the catalytic converter for a loose heat shield.