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Home >> Jeep >> 1996 >> Grand Cherokee Limited, 5.2 Y >> Repair and Diagnosis >> External Pages >> Different car >> Section 4 (Engine Controls - Tests W/Codes - 3.0L) >> Diagnostic Charts >> Test NTC-13A - Checking Minimum Idle Airflow

Test NTC-13A - Checking Minimum Idle Airflow

WARNING: This page is about a different car, the 1994 Plymouth Sundance, 1994 Plymouth Acclaim, 1994 Dodge Spirit, 1994 Dodge Shadow, and 1994 Chrysler LeBaron. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn ignition off. Disconnect PCV valve hose from PCV valve. Plug PCV hose end. Disconnect idle purge hose from engine vacuum harness "T". Install Vacuum Fitting (6457) to intake manifold idle purge hose. Start engine. Allow engine to reach normal operating temperature.
  2. If vehicle has less than 1000 miles on odometer, go to next step. If vehicle has more than 1000 miles on odometer, using DRB, actuate minimum airflow. Engine speed should be 560-950 RPM. If engine speed is within specification, minimum airflow is normal. Test is complete. If engine speed is not within specification, go to step 4).
  3. Using DRB, actuate minimum airflow. Engine speed should be 610-950 RPM. If engine speed is within specification, minimum airflow is normal. Test is complete. If engine speed is not within specification, go to next step.
  4. Turn ignition off. Remove throttle body from engine. Clean throttle body bore and throttle blade. Install throttle body on engine. Go to step 1) and repeat minimum idle airflow test. After cleaning throttle body bore and throttle blade, minimum idle speed is not within specification, problem is not caused by throttle body. Go to TEST NTC-14A.
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