Procedure # 1

THROTTLE BODY AND IDLE AIR BY-PASS VALVE CLEANING


CAUTION: DO NOT RUN VEHICLES EQUIPPED WITH AIR FLOW METERS DURING THE CLEANING PROCEDURE. IF THERE IS A YELLOW/BLACK "ATTENTION" LABEL ON THE THROTTLE BODY ADVISING NOT TO CLEAN, OR IF THE VEHICLE IS IDENTIFIED AS ACCEPTING SERVICE KIT (F2PZ-9F939-A), USE PROCEDURE # 2 FOR IDLE AIR BY-PASS VALVE CLEANING ONLY.

1. Plug the actuator into the connector in the Rotunda Cleaner/Tester, Tool 113-00009.

2. Remove the air duct to the throttle body inlet.

3. Disoonnect the idle air by-pass valve signal lead.

4. Attach the actuator harness plug to the idle air by-pass valve.

5. Start the actuator and then start the engine. Do not start engines that have air flow meters.

6. Spray just enough Carburetor Tune-up Cleaner (D9AZ-19579-AA) into the throttle bore to wet the bore and throttle plate.

7. Spray the Carburetor Tune-up Cleaner for about five (5) seconds into the idle air by-pass valve inlet passage while the actuator is operating.

8. Stop the engine and actuator. Let everything soak for fifteen (15) minutes.

9. After a fifteen (15) minute soak, saturate the cleaning brush with solvent and scrub between the throttle body bore and plate while holding the throttle wide open.

NOTE: IT IS NECESSARY TO APPLY SOME PRESSURE ON THE BRUSH WHILE SCRUBBING.

10. Repeat saturating the brush and scrubbing for one (1) to two (2) minutes, making sure to reach into the corners where the throttle shaft meets the bore wall.


11. Start the actuator and the start the engine. Do not start engines that have air flow meters.

12. Spray Carburetor Tune-up Cleaner into the throttle bore for up to one (1) minute to wash away residue. Do not spray for longer than six (6) continuous seconds on engines that have air flow meters and are not running.

13. Spray Carburetor Tune-up Cleaner into the idle by-pass valve passage leading to the inlet of the valve for up to one (1) minute. Do not spray for longer than six (6) continuous seconds on engines that have air flow meters and are not running.

14. Stop actuator and stop engine, if running.

NOTE: MAKE SURE THE THROTTLE PLATES OPERATE FREELY AND CLOSE PROPERLY.

15. Reinstall the air duct.

16. Start and run the engine for about one (1) minute to dry out the solvent residue.

17. Operate the actuator to make sure the solvent is purged from the idle by-pass valve.

18. Disconnect the actuator from the idle air by-pass valve.

19. Reattach the control signal lead to the air by-pass valve.

20. Check engine for normal operation. It may be necessary to reset the idle speed due to a previous adjustment for an idle concern. (Refer to the respective Powertrain/Emissions Diagnosis Service Manual, Throttle Body Section, for idle speed adjust procedure.)