Cleaning the Throttle Body

1. Start the engine and warm it up until the temperature of the engine coolant reaches 80°C (176°F) or higher; then stop the engine.
2. Disconnect the air intake hose at the throttle body side.
3. Plug the bypass passage entrance of the throttle body.





Caution: Be absolutely sure that no cleaning liquid enters the bypass passage.

4. Spray cleaning liquid (from the intake port of the throttle body) onto the valve, and then leave as is for about five minutes.
5. Start the engine and race it a few times; then let it run at idle speed for about one minute.

NOTE: If, because the bypass passage is plugged, the engine idling speed is unstable (or the engine stalls), let the engine run with the throttle valve slightly open.)

6. If deposits are not removed from the throttle valve, repeat steps (4) and (5).
7. Remove the plug from the bypass passage entrance.
8. Connect the air intake hose.
9. Using the scan tool, erase the diagnostic trouble code, or disconnect the battery's ground cable for ten seconds or longer and then reconnect it.
10. Adjust the basic idle speed (engine speed adjusting screw).

NOTE: If the engine hunts during idling after the basic idle speed is adjusted, disconnect the negative battery cable from the battery terminal for 10 seconds or more, and then idle the engine again.