Originally Posted by myarmar

I'm not sure it would help but try:

1. Turn ignition on, but don't start the engine. After a few seconds you will hear noise from engine Throttle Actuator going full open.
2. Leave ignition ON for 1 minute.
3. Turn it OFF and wait 1 minute.
4. Start the engine and see if the problem gone

This recalibrates Throttle actuator full open/closed positions. Sometimes it might lose it's calibration if the battery was disconnected or dead.