And after you put some gas in it, if it still does it, remove the throttle boddy and IAC sensor---the one on the front thats held in by two torx screws---and with a can of carb cleaner and a rag, some Q-tips and what ever else that is not sharp and pointy (no metal picks to damage surfaces), clean the throttle body out real good until it looks new. Then soak the rag and wipe the pointy tip of the IAC motor untill it is clean. reset the computer by disconeccting the battery.

Before you put it on, look down into the intake to see if there is a wet oily film on the bottom. If it is, your plenum gasket on the bottom of the intake is leaking and needs to be replaced.

Reinstall the throttle body and hopefully it should cure the issue. If not, my next question would be when was the last time it had a full tune up.