why is my car vibrating in idle like my enigne is rocking?

2004 CHEVROLET IMPALA
184,917 MILES
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04IMPAL
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  • 1 POST
runs smooth while driving but when holding still it has a rocking feel to the car not as if its reving up but like something may be loose.
Mar 2, 2012 at 1:29 PM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Do you have a check engine light?

Have the engine mounts checked, also could be misfiring
Mar 2, 2012 at 2:12 PM
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