A subtle issue, car died when coasting at low speed, intermittently, not reproducible; at re-start, OK. Diagnostics identified an issue with the throttle manifold, which was replaced. However, the car again died, we took back and after careful examination, an issue with the fuel pressure was found, and a fuel pressure sensor was replaced; seems OK. In both visits, the federal employee discount and polite interactions, and notably, finding and addressing two subtle probably independent and complex issues, made this overall a four star set of interactions.