* Fuel System Issues:
* Clogged Fuel Filter: A dirty fuel filter restricts fuel flow to the engine, leading to power loss and stalling.
* Fuel Pump Failure: A failing fuel pump can't deliver enough fuel under pressure, causing similar symptoms.
* Low Fuel Pressure: Problems with the fuel pump, fuel pressure regulator, or clogged fuel lines can all reduce pressure.
* Bad Fuel Injectors: Clogged or malfunctioning injectors don't deliver fuel properly to the cylinders.
* Ignition System Problems:
* Spark Plug Issues: Worn, fouled, or damaged spark plugs prevent proper combustion.
* Ignition Coil Problems: A failing ignition coil can't deliver enough voltage to the spark plugs.
* Ignition Control Module (ICM) Failure: The ICM controls the ignition system; a faulty one can cause erratic spark delivery.
* Crankshaft Position Sensor (CKP) or Cam Position Sensor (CMP) Failure: These sensors tell the computer the engine's position; a faulty sensor disrupts timing.
* Air Intake System Problems:
* Mass Airflow Sensor (MAF) Failure: The MAF sensor measures the amount of air entering the engine; a faulty sensor provides inaccurate information, leading to poor fuel mixture and stalling.
* Dirty Air Filter: A severely clogged air filter restricts airflow, causing a lean fuel mixture.
* Vacuum Leaks: Leaks in the intake system disrupt the air-fuel mixture.
* Transmission Issues (Automatic Transmission):
* Transmission Problems: Although less likely to cause a complete stall, transmission issues can cause power loss during acceleration. This would require further investigation.
* Other Potential Causes:
* Throttle Body Issues: A dirty or malfunctioning throttle body can restrict airflow.
* Computer Problems (PCM/ECM): The Powertrain Control Module (PCM) or Engine Control Module (ECM) controls many engine functions. A faulty computer can cause a variety of problems.
* Alternator Failure: While less likely to cause immediate stalling, a failing alternator can lead to power loss and eventual stalling as the battery discharges.
What to Do:
This isn't an exhaustive list, and diagnosing the problem requires a methodical approach. Don't attempt major repairs yourself unless you have significant mechanical experience. Here's what you should do:
1. Check engine codes: Use an OBD-II scanner to read any diagnostic trouble codes (DTCs) stored in the vehicle's computer. These codes can point to the problem area.
2. Consult a mechanic: A qualified mechanic can properly diagnose the issue and perform the necessary repairs. They have the tools and expertise to test the components mentioned above.
3. Don't drive the vehicle excessively: Continuing to drive with a serious problem could cause further damage.
Simply stating the symptoms isn't enough to diagnose the problem. A professional inspection is necessary to determine the root cause of the stalling and power loss.
