2000 Chevy Impala Engine shakes during idle

2000 CHEVROLET IMPALA
122,000 MILES • 6 CYL • 2WD • AUTOMATIC
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LOCOVAL
  • MEMBER
  • 1 POST
When I start it in the morning the car starts to warm up, once the RPMs drop to idle speed (750 RPM), the engine starts to shake as if the car will turn off and it does turn off sometimes. After about 20 seconds, the RMPs go up and the engine acts as if nothing is wrong.
if I start to drive before the RPMs drop to idle, pressing the gas pedal does nothing, no response. The car moves but it does not accelerate until about 20 seconds later.
Any ideas? I appreciate any help.
Aug 10, 2010 at 1:54 PM
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RASMATAZ
  • ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Clean out the idle air control valve and test the throttle position sensor-
Aug 10, 2010 at 5:08 PM
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