Question about 1990 Cadillac SeVille

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Idle to fast when eng reach oper. temp about 800 to 1200 rmp

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Actually that's not that high. If you were above that or it was fluctuating you got a problem like an IAC sensor. You might have a filthy TPS. Clean the throttle bottle wouldn't hurt and why you might be getting different idle RPM's.

Posted on Sep 04, 2010

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