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Throttle Position Sensor Test

  1. Disconnect throttle position sensor harness connector. Check resistance between sensor terminals No. 1 and 4. See WIRING DIAGRAMS  . Resistance should be 3500-6500 ohms.
  2. Connect an analog ohmmeter between sensor terminals No. 1 and 3. Operate throttle valve slowly from idle to wide open throttle. Resistance should change smoothly as throttle is opened and closed. Replace and adjust throttle position sensor as necessary. See ON-VEHICLE ADJUSTMENT article in ENGINE PERFORMANCE.
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