Mechanics

CADILLAC CONCOURS ENGINE PROBLEM

1994 Cadillac Concours

Engine Performance problem
1994 Cadillac Concours V8 Front Wheel Drive Automatic 120000 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)
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Justabrat
April 21, 2009.




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?

Factoryjack
Apr 21, 2009.


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