Throttle Body Cleaning

Throttle Body:

1. Start the engine, warm it up until engine coolant temperature rises to 80°C (176°F), and stop the engine.
2. Disconnect the air intake hose at the throttle body side.
3. Put a plug in the inlet of bypass passage in the Throttle Body.

CAUTION: Never allow cleaning agent to flow into the bypass passage.

4. Spray cleaning agent from the intake port of the Throttle Body to the valve and leave undisturbed for 5 minutes.
5. Start the engine and "rev" it several times. Then, let it idle for approximately one minute.

NOTE: If the engine idle speed becomes unstable (and quits, in the worst case) after plugging the bypass passage, run the engine with the throttle valve slightly opened.

6. If the deposit cannot be removed from the throttle valve, repeat steps 4 and 5.
7. Disconnect the plug from the inlet of the bypass passage.
8. Install the air intake hose.
9. Use a scan tool to erase the diagnostic trouble code or disconnect the battery ground cable for more than 10 seconds and then connect it again.
10. Adjust the basic idle speed (speed adjusting screw).

NOTE: If the engine hunts while it is idling after adjustment of the basic idle speed, disconnect the negative cable from the battery terminal for more than 10 seconds and then idle the engine again.