Dakota R/T 2WD V8-5.9L VIN Z LDC (1999)
Idle Purge Line
5. Disconnect the idle purge vacuum line from fitting at throttle body. This vacuum line is located on the front of throttle body next to the MAP
sensor. Cap the fitting at throttle body after vacuum line has been removed.
6. Connect the DRB scan tool to the 16-way data link connector. This connector is located under the instrument panel to the left of the steering
column. Refer to the appropriate Powertrain Diagnostic Procedures service manual for DRB operation.
7. Start the engine and allow to warm up.
8. Using the DRB scan tool, scroll through the menus as follows: select-Stand Alone DRB III, select 1999 Diagnostics, select-Engine, select-System
Test, select-Minimum Air Flow.
9. The DRB scan tool will count down to stabilize the idle rpm and display the minimum air flow idle rpm. The idle rpm should be between 500 and
900 rpm. If the idle speed is outside of these specifications, replace the throttle body. Refer to Throttle Body in the Component
Removal/installation.
10. Disconnect the DRB scan tool from the vehicle.
11. Remove cap from idle purge fitting at throttle body and install vacuum line.
12. Remove orifice tool and connect vacuum line to PCV valve.
13. Install air duct to throttle body.
