Test NTC-11: Checking Minimum Idle Air Flow
- Check throttle body minimum airflow. See THROTTLE BODY MINIMUM AIRFLOW under IDLE SPEED & MIXTURE in ON-VEHICLE ADJUSTMENTS - FWD VANS article.
- If throttle body minimum airflow idle RPM is within specification, throttle body is okay. Test is complete. If throttle body minimum airflow idle RPM is not within specification, go to next step.
- Remove throttle body. With throttle fully open on throttle body, clean throttle body with parts cleaner. Using soft brush or pad, ensure throttle body bore and throttle plate are clean. Dry throttle body with compressed air.
- Reinstall throttle body. Recheck throttle body minimum airflow. If throttle body minimum airflow idle RPM is within specification, throttle body is okay. Test is complete. If throttle body minimum airflow idle RPM is not within specification, replace throttle body. Perform TEST VER-2A .