why is my 2003 chevy impala starting to idle hi?

  • Thread starter Thread starter johnbgood1
  • Start date Start date
it probably has a vacuum leak.try spraying a non flammable liquid around the intake manifold,and listen for achange in idle speed
 
Check all the vacuum hoses. There should be a vacuum routing diagram under the hood somewhere. There is probably a hose that either cracked or popped off.
 
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