O2 Sensor mayhem / rough idle / high idle/( with pics)

Discussion in '1998 - 2011 Ford Ranger' started by Theroughranger, Apr 25, 2024.

  1. Theroughranger

    Theroughranger New Member

    I need help troubleshooting my 2009 Ford Ranger four-cylinder XLT 2 Wheel Dr. my RPMs at idle are 850. And my O2 sensor is going from lean to rich every second I have 113,000 miles and I replaced both upstream and downstream O2 sensors and I replaced the idle air control valve and I cleaned out the mass airflow sensor.


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