1994 Cadillac Concours

1994 CADILLAC DEVILLE CONCOURS
120,000 MILES • V8 • FWD • AUTOMATIC
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JUSTABRAT
  • MEMBER
  • 1 POST
Why does my car idle run high, then low? It is also difficult to start and then cuts off & dies. Sometimes it can run very smooth for a minute, then it starts with the idle problem & everything else? (has new plugs & fuel filter)
Apr 21, 2009 at 4:43 AM
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FACTORYJACK
  • CAR REPAIR CONTRIBUTOR
  • 4,159 POSTS
You could have a failing idle speed control motor, dirty/sticking throttle body, faulty ecm, or wiring issues. Is there any check engine light, or messages displayed on the info center?
Apr 21, 2009 at 10:35 PM
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