kyshooter

This problem only seems to happen once a month. I can drive the 4runner around town and let it sit for 5min or 5 hours but once a month or so it starts and then sits around 300rpm's and dies. I can start it ten more times and it dies. Usually i just turn the A/C on for the extra rpm's. Then by the next day there is no problem for another month. Thought it might be the fuel filter but I am not sure where to start.