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Why does my car run for 20 minutes and then stall?

Fuel Issues

* Clogged fuel filter: If your fuel filter is clogged, it will restrict the flow of fuel to the engine, causing it to stall.

* Faulty fuel pump: A faulty fuel pump will not be able to deliver enough fuel to the engine, leading to stalling.

* Leaking fuel injectors: Leaking fuel injectors can cause the engine to run rich, which can lead to stalling.

* Vapor lock: Vapor lock is a condition in which the fuel in your car's fuel lines turns into a vapor, blocking the flow of fuel to the engine, leading to stalling.

Engine Issues

* Dirty air filter: A dirty air filter can restrict the airflow to the engine, causing it to stall.

* Faulty ignition system: A problem with your car's ignition system (e.g., spark plugs, wires, coil pack) can cause the engine to misfire and stall.

* Vacuum leak: A vacuum leak can cause the engine to run lean (insufficient fuel), leading to stalling.

* Faulty oxygen sensor: A faulty oxygen sensor can cause the engine to run rich, leading to stalling.

* Stuck or dirty throttle body: A stuck or dirty throttle body can restrict airflow to the engine causing stalling.

Cooling Issues

* Overheating: If your engine overheats, it can cause it to stall to protect itself from damage.

* Faulty thermostat: A faulty thermostat can keep your engine from reaching its optimal operating temperature leading to stalling.

* Low coolant levels: Low coolant levels can lead to overheating and stalling.

* Radiator problems (e.g., leaks or blockages): Issues with your radiator can affect its ability to cool the engine, leading to overheating and stalling.

* Water pump failure: A malfunctioning water pump cannot circulate the coolant properly, causing overheating and stalling.

Electrical Issues

* Weak or dead battery: A weak or dead battery can cause the engine to stall as it provides the electrical power needed for various engine components to operate.

* Alternator problems: A faulty alternator can't charge the battery while driving, causing the battery to discharge and eventually leading to stalling.

* Starter problems: Issues with the starter motor or its wiring can prevent the engine from cranking or starting properly.

* Loose or corroded electrical connections: Loose or corroded electrical connections can disrupt electrical signals, affecting engine performance and causing stalling.

Engine Control Unit (ECU) Issues

* Software glitches or errors: Software issues in the ECU can disrupt the engine's normal operation, leading to stalling.

* Sensor malfunctions: Faulty sensors that provide data to the ECU can lead to incorrect fuel mixture, ignition timing, or other problems that can cause the engine to stall.

Other Mechanical Issues

* Fuel tank vent problems: A blocked or malfunctioning fuel tank vent can cause a buildup of pressure in the fuel tank and affect fuel flow to the engine.

* Transmission issues: Problems with the transmission (e.g., slipping, overheating) can also lead to stalling.