* Fuel System Problems:
* Fuel Filter: A clogged fuel filter restricts fuel flow, leading to stalling or cutting out.
* Fuel Pump: A failing fuel pump might not deliver enough fuel under pressure.
* Fuel Injectors: Faulty injectors can cause inconsistent fuel delivery, leading to the engine shutting down.
* Low Fuel Level: While seemingly obvious, a very low fuel level can sometimes cause issues.
* Electrical System Problems:
* Crankshaft Position Sensor (CKP): This sensor tells the engine's computer where the crankshaft is. A faulty sensor can cause the engine to stop running.
* Camshaft Position Sensor (CMP): Similar to the CKP, a faulty CMP sensor disrupts timing and can cause stalling.
* Mass Airflow Sensor (MAF): This sensor measures the amount of air entering the engine. A faulty MAF can lead to incorrect fuel mixture and stalling.
* Battery/Alternator: A weak battery or failing alternator can cause power fluctuations, leading to the engine cutting out.
* Wiring Issues: Damaged or corroded wiring can interrupt the electrical signals to various components.
* Engine Management System (EMS) Problems:
* Engine Control Module (ECM): The ECM is the "brain" of the engine. A malfunctioning ECM can cause numerous problems, including intermittent stalling.
* Other Potential Issues:
* Vacuum Leaks: Leaks in the vacuum system can disrupt engine operation.
* Glow Plug Issues (Diesel): Problems with glow plugs (especially in cold weather) can prevent the engine from starting or running smoothly.
What to do:
1. Check the obvious: Ensure you have enough fuel. Check the battery terminals for corrosion.
2. Have it professionally diagnosed: This is the most important step. A mechanic can use diagnostic tools to scan the engine's computer for error codes (DTCs), which will pinpoint the likely cause. This will save you time, money, and potential further damage.
3. Don't continue driving: Driving with an engine that's cutting out can cause further damage and create safety hazards.
Ignoring the problem will likely lead to more serious (and more expensive) repairs. Get it checked out by a qualified mechanic as soon as possible.
