I have a peculiar issue with my engine (2003, 16k miles): My engine stalls upon startup 1-2 times when leaving my office! It'll start up fine in the morning, during the day on the weekends, and at night; but, when I leave the office, the car stalls 5 seconds after starting. This has been going on for 4 consecutive work days.

Am I not working hard enough?

Anyway, I'm taking it to the dealer tomorrow morning, and I'm hoping I can go in with some idea of what the problem might be.

Some useful info:
- I only use 93 octane Shell from the same station
- There are no warning lights
- When starting, the engine struggles at around 500 RPM, then dies
- 15k service done at 15k (and new RMS, too)
- No mods