High idle on 1997 sc400

Asked by Dman62 Jul 31, 2012 at 09:14 AM about the 1997 Lexus SC 400 RWD

Question type: Maintenance & Repair

Car idles very high and it erratic, 900 to 1400 rpm s......causes ?

1 Answer
6,450

Michael answered 12 years ago

Check for vacuum leaks, misfires, and clean your idle control valve and egr valve. Its impossible to say exactly what it is without more info.

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