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    4. 2002 Deville runs rough when idling when car is at normal operating temperature
    2002 Deville runs rough when idling when car is at normal operating temperature

    150,000 miles, plugs recently changed, car starts on first try everytime, but once warmed up and you roll to a stop it fluctuates between 600 and 950 rpm and runs rough.

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    0  Views: 1136 Answers: 1 Posted: 12 years ago
    Tags: 2002 deville rough idle
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      1 Answer

      Sounds like a vacuum line issue. 

      12 years ago. Rating: 0
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