* Fuel pump: The pump might be weak, failing to deliver enough fuel under pressure to sustain the engine once it's running. It might work briefly to get the engine started, but not maintain the pressure needed for continuous operation.
* Fuel filter: A clogged fuel filter restricts fuel flow. The engine might get enough fuel to start but quickly starve once demand increases.
* Fuel pressure regulator: This component regulates fuel pressure in the system. A malfunctioning regulator can cause erratic fuel delivery, leading to stalling.
* Pickup tube in the fuel tank: This tube draws fuel from the tank to the pump. If it's clogged with debris or sediment, it could restrict fuel flow.
* Fuel injectors: While less likely to cause a start-then-stall problem *exclusively*, clogged or malfunctioning injectors could be a contributing factor. They might work enough for a brief start but then fail to consistently deliver fuel.
While fuel delivery is the most probable cause given the symptoms, other issues, such as ignition problems (coil, distributor cap, rotor, etc.) or vacuum leaks, should also be considered in a proper diagnostic process. A mechanic would need to perform tests to pinpoint the exact problem.
