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BMW M3 e46 car starts then dies?

1. Faulty Fuel Pump

The fuel pump is responsible for delivering fuel from the gas tank to the engine. If the fuel pump is faulty, it will not be able to provide enough fuel to the engine, causing it to stall.

2. Faulty Fuel Pressure Regulator

The fuel pressure regulator controls the amount of fuel pressure in the fuel system. If the fuel pressure regulator is faulty, it can cause the fuel pressure to be too high or too low, which can lead to stalling.

3. Clogged Fuel Filter

The fuel filter removes dirt and debris from the fuel before it enters the engine. If the fuel filter is clogged, it will restrict the flow of fuel to the engine, causing it to stall.

4. Faulty Mass Air Flow Sensor

The mass air flow sensor measures the amount of air that enters the engine. If the mass air flow sensor is faulty, it will provide incorrect readings to the engine computer, which can lead to stalling.

5. Faulty Oxygen Sensor

The oxygen sensor measures the amount of oxygen in the exhaust gases. If the oxygen sensor is faulty, it will provide incorrect readings to the engine computer, which can lead to stalling.