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1994 Cadillac Concours

Tiny
JUSTABRAT
  • MEMBER
  • 1994 CADILLAC DEVILLE CONCOURS
  • V8
  • FWD
  • AUTOMATIC
  • 120,000 MILES
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)
Tuesday, April 21st, 2009 AT 4:43 AM

1 Reply

Tiny
FACTORYJACK
  • MECHANIC
  • 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?
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Tuesday, April 21st, 2009 AT 10:35 PM

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