1997 Toyota 4Runner V6 idles too high(2000 RPM or above) only at high altitudes

Asked by FourRunner97 Dec 29, 2018 at 12:11 PM about the 1997 Toyota 4Runner 4 Dr SR5 4WD SUV

Question type: Maintenance & Repair

1 Answer
101,615

KenF answered 5 years ago

Try cleaning or replacing the mass air flow sensor and make sure intake/throttle body is clean. The engine computer relies on sensor inputs to determine the correct air/fuel mixture, so any incorrect inputs can result in high RPMs, or other performance issues. High altitude will negatively affect any engine, save those running a forced induction.

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