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Car vibrates (rocks) on start and acceleration

Tiny
LOAFERDUDE
  • MEMBER
  • 2002 BUICK LESABRE
  • V6
  • 2WD
  • AUTOMATIC
  • 150,000 MILES
Car had a burning smell replaced serpentine and idler pulley started car while belt off didn't vibrate installed aid items car rocks bad.
Friday, February 6th, 2015 AT 2:28 PM

2 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Replace tensioner as well then check for a bad motor mount. It still may be something in accessory drive however.
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Saturday, February 7th, 2015 AT 6:57 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,347 POSTS
It sounds like you have an engine accessory that is locked up, I would remove the belt and spin each pulley to make sure they turn freely.
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Thursday, July 18th, 2024 AT 6:22 PM

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