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Why does a car start and then cut off?

A car may start and cut off for various reasons. Here are some common causes:

1. Fuel-related issues:

- Empty or low fuel tank

- Faulty fuel pump or fuel filter

- Clogged fuel line

- Malfunctioning fuel injector

2. Ignition system problems:

- Faulty spark plugs or spark plug wires

- Problems with the ignition coil

- Malfunctioning ignition switch

3. Airflow restrictions:

- Clogged air filter

- Faulty mass air flow (MAF) sensor

- Vacuum leaks

4. Electrical problems:

- Weak battery or loose battery connections

- Faulty alternator or starter

- Issues with wiring, fuses, or relays

5. Mechanical issues:

- Timing chain or belt problems

- Engine compression issues

- Faulty piston rings or cylinder head gasket

- Worn-out engine bearings

If your car starts and immediately cuts off, it is important to diagnose the root cause to prevent further damage and ensure proper vehicle operation. It may be necessary to consult with a qualified mechanic or automotive technician who can diagnose and fix the issue accurately.