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Larry 12/26/2012
1997 Geo Prizm Base 4 Cyl 1.6L - Engine
What could be causing excessive high revolution per minute when engine is cold & in 2-3 minutes normal?
250, 000 miles. Happened last few months in Missouri in Sept, Oct, Nov and now in Dec. Starts easy. Runs smooth. Good gas mileage.
1 Answer
  • Jimm
    Jimm 12/26/2012
    Several possibilities; vacuum leak, faulty idle air control (IAC) valve. Check on-line for the many parts supply sources, such as; or for the replacement parts. For example, the IAC lists for around $176.00 for your vehicle.

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