Hey all, I have a 2000 ES w/ almost 90'000 on it. Lately when I start it , it will turnover, RPM's hit 500 for a second and then it stalls. It is cured by stepping on the accelerator to get the RPM's up to idle, then it's fine for the rest of the ride and there is no stalling at all. This just started happening and it's erratic, it does not happen most of the time. Any idea what this could be?