my 99 gs400 (44kmiles) just shuts off on me while driving (low speed) 5-15mph. i noticed this happens after i fill gas. this happened to 3 times with in the past 6 months. 2 times in the parking lot other time while wating to make a left turn. (scary). i need HELP. already been to the dealership with this problem they couldn't do anything for me ( car under warranty).HELP HELP.

 

I think cleaning the throtle body is one solution.
The other is to leave the AC running at all times in low idle conditions.

There are quite a few threads on the low idle stall problem just need to do some searching.