Villolently shakes on acceleration

Tiny
MICHAEL.SALSBURY
  • MEMBER
  • 2010 CHEVROLET IMPALA
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 93,000 MILES
When I press on tye gas my car violently shakes and shimmies and it also does this on cruise conrltrol and press the accelerater button. But the second I take my foot off tue gas it stops. It shaoes so bad that I have a can of protein in my passenger seat and it actually begins to roll
Sunday, February 28th, 2016 AT 9:38 AM

5 Replies

Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
If your engine is causing is causing this, how long since a tune-up? Any applicable trouble codes?
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Sunday, February 28th, 2016 AT 10:08 AM
Tiny
MICHAEL.SALSBURY
  • MEMBER
  • 3 POSTS
Bought the car a yewr ago and they did a tune up than and I havnt been able to hook up a code reader yet
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Sunday, February 28th, 2016 AT 10:12 AM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
If this happened on a hill, I might suggest you down shift from od to D and see if it makes any difference? At the moment, I'm trying to decide if this is caused by engine--suspension--drivetrain? I need something to point me in right direction.
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Sunday, February 28th, 2016 AT 10:34 AM
Tiny
MICHAEL.SALSBURY
  • MEMBER
  • 3 POSTS
I could be on a flat surface and my car will still do this. It only stops when my foot is off the gas
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Sunday, February 28th, 2016 AT 11:51 AM
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Check the intake air flow system, maf--map--tps. Don't replace anything unless your testing points in that direction. Also, use a gage and check proper fuel pressure, vehicle under load.
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Monday, February 29th, 2016 AT 9:04 AM

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