* Fuel Pump Issues: The fuel pump relies on the fuel in the tank to lubricate itself. Running the tank completely dry can cause the pump to overheat and fail, or damage its internal components. This is a common problem.
* Air in the Fuel Lines: Running out of gas can introduce air bubbles into the fuel lines. These air bubbles can prevent fuel from reaching the engine. The fuel system may need to be "bled" to remove the air.
* Clogged Fuel Filter: Even though the tank is filled, debris dislodged from the tank bottom during the dry run might clog the fuel filter. This restricts fuel flow.
* Dead Battery: Cranking the engine repeatedly while out of gas may have drained the battery.
* Fuel Pump Relay: The fuel pump relay, an electrical component, might have failed due to overheating or other stress from running the pump dry.
* Immobilizer System (Less Likely): Some cars have immobilizer systems that might require a specific sequence of actions after running out of gas (although this is less common).
What to do:
1. Check the Battery: Test the battery voltage with a multimeter. If it's low, jump-start the car or charge the battery.
2. Listen for the Fuel Pump: Turn the ignition key to the "on" position (without starting the engine). You should hear a brief hum from the fuel pump located near the fuel tank. If you don't hear it, the pump may be faulty or the relay may have failed.
3. Check the Fuel Filter: This usually requires some mechanical knowledge. It's a small filter in the fuel line and could be clogged.
4. Try to Crank the Engine Repeatedly (Short Bursts): Sometimes, this helps purge any air from the fuel system. But don't overdo it – give the battery a rest between attempts.
5. Have it Towed: If you're uncomfortable checking these things yourself or you've tried the above and it still won't start, it's best to have your car towed to a mechanic for diagnosis and repair.
The most probable cause, given the circumstances, is a fuel pump problem or air in the fuel lines. Get it checked professionally to avoid further damage.
