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Why does my check engine light and temp light flash on and off and speedometer drops and idles rough in my 1990 olds calais?
Wiki User
∙ 15y ago
There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired.
Wiki User
∙ 15y ago
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Low coolant, check when engine is cold.
