Here are some other potential causes:
* Crankshaft Position Sensor (CKP): A failing CKP sensor can cause intermittent stalling, especially when the engine is hot. This sensor is crucial for engine timing.
* Coolant Temperature Sensor (CTS): A faulty CTS provides inaccurate readings to the engine control module (ECM), leading to poor fuel mixture and potential stalling, particularly when the engine is hot.
* Mass Airflow Sensor (MAF): A dirty or faulty MAF sensor can give inaccurate readings of the air intake, resulting in a lean fuel mixture and stalling.
* Ignition Coil(s) or Ignition Module: Heat can exacerbate problems with these components, leading to misfires and stalling after the engine warms up.
* Fuel Filter: A clogged fuel filter restricts fuel flow, but this usually leads to a gradual loss of power, not necessarily a complete stall after a short drive.
* Wiring Issues: Heat can cause deteriorated wiring to short or open, affecting various engine components.
Troubleshooting Steps:
1. Check the fuel pressure: This is the most important initial step to eliminate or confirm fuel pump issues. You'll need a fuel pressure gauge to measure the pressure at the fuel rail. Low pressure after the engine's been running for a while points to a fuel pump, or possibly a clogged filter.
2. Inspect for error codes: Use an OBD-II scanner to retrieve any diagnostic trouble codes (DTCs) stored in the ECM. These codes can pinpoint the faulty component.
3. Check the obvious: Look for loose or corroded connections, especially around the fuel system, ignition system, and sensors.
4. Test the sensors (CKP, CTS, MAF): While testing these requires specialized tools or a visit to a mechanic, it is crucial for accurate diagnosis.
In short: While a bad fuel pump is a possibility, it's less likely given the delayed stalling. Start with checking the fuel pressure and retrieving any error codes. From there, you can more effectively troubleshoot the issue. Trying to guess and replace parts without a diagnosis will likely be costly and ineffective.
