* Fuel System Problems:
* Fuel Pump Failure: A failing fuel pump can't deliver enough fuel to the engine, leading to stalling. This is a common cause of sudden shutdowns.
* Clogged Fuel Filter: A clogged filter restricts fuel flow, causing similar symptoms to a failing fuel pump.
* Fuel Pressure Regulator Issues: A malfunctioning regulator can cause inconsistent fuel pressure, leading to stalling.
* Ignition System Problems:
* Crankshaft Position Sensor (CKP Sensor): This sensor tells the computer the engine's rotational speed. A faulty sensor prevents the engine from firing properly.
* Cam Position Sensor (CMP Sensor): Similar to the CKP sensor, a faulty CMP sensor disrupts ignition timing.
* Ignition Coil(s): A failing coil won't provide the necessary spark to ignite the fuel-air mixture.
* Distributor Cap and Rotor (if applicable): Older vehicles with distributors can experience problems with worn or damaged parts, leading to poor ignition.
* Electrical System Problems:
* Alternator Failure: The alternator charges the battery. If it fails, the battery will drain, and the car will shut off. Often, you'll see warning lights before complete failure.
* Battery Issues: A weak or failing battery can't supply enough power to run the engine.
* Loose or Corroded Connections: Poor connections in the electrical system can interrupt power flow.
* Computer/Sensor Problems:
* PCM (Powertrain Control Module) Issues: The PCM controls many engine functions. A faulty PCM can lead to a variety of problems, including stalling.
* Mass Airflow Sensor (MAF Sensor): This sensor measures the amount of air entering the engine. A faulty sensor can cause incorrect fuel delivery and stalling.
* Throttle Position Sensor (TPS): A faulty TPS provides inaccurate information about the throttle position, which can cause the engine to stall.
* Other Potential Causes:
* Overheating: An overheated engine can shut itself down to prevent damage.
* Transmission Problems: In some cases, transmission issues can cause the engine to stall.
Troubleshooting Steps:
It's difficult to diagnose the exact cause without inspection. However, here are some basic troubleshooting steps:
1. Check the obvious: Battery terminals for corrosion, fluid levels (oil, coolant), and listen for any unusual noises.
2. Check warning lights: Pay close attention to any warning lights that illuminate on the dashboard (check engine light, battery light, etc.).
3. Have the car diagnosed: Take the Stratus to a qualified mechanic or auto parts store that offers diagnostic scans. A scan tool can read trouble codes from the PCM, which can help pinpoint the problem.
Important Note: Driving a car that shuts off unexpectedly can be dangerous. If the problem persists, avoid driving the vehicle until it's been professionally diagnosed and repaired.
