* Intermittent Fuel Delivery Problem: This is a prime suspect. The issue might be:
* Clogged Fuel Filter: A partially clogged filter restricts fuel flow, especially under higher demand (acceleration).
* Faulty Fuel Pump: It might be weak, delivering insufficient pressure, especially when the engine is under load. This is more likely to show up when the fuel level is low. The pump could also be intermittently failing.
* Fuel Pressure Regulator: This component regulates fuel pressure. A malfunction could lead to inconsistent fuel delivery.
* Dirty Fuel Injectors: Clogged or dirty injectors can cause inconsistent fuel spray, leading to poor combustion and stalling.
* Ignition System Issues:
* Failing Ignition Coil(s): A weak or failing coil can cause misfires, especially under stress. This is often more pronounced when the engine is hot.
* Worn Spark Plugs or Wires: These are relatively inexpensive to replace and are a common cause of misfires. They should be checked regardless of other findings.
* Crankshaft Position Sensor (CKP) or Camshaft Position Sensor (CMP): These sensors tell the computer the engine's rotational position. A faulty sensor will lead to timing issues, potentially causing stalling or choking.
* Mass Airflow Sensor (MAF) Sensor: This sensor measures the amount of air entering the engine. A faulty MAF sensor provides inaccurate data to the engine computer, leading to a poor air/fuel mixture and poor performance, potentially stalling.
* Throttle Position Sensor (TPS): If this sensor is malfunctioning, the computer might not be receiving accurate information about the throttle position, affecting fuel delivery and potentially leading to stalling.
* Vacuum Leaks: A leak in the vacuum system can cause a lean fuel mixture and rough running, stalling, especially when the engine is under load or idling.
* Computer Issues (PCM/ECM): While less likely, a failing engine control module can cause erratic behavior and is difficult to diagnose. This is usually a last resort.
Why the Dealership Might Have Missed It:
* Intermittent Problem: The issue might only occur under specific conditions that weren't replicated during the dealership's testing.
* Lack of Diagnostic Tools/Expertise: Some shops lack the necessary diagnostic equipment or expertise to pinpoint intermittent problems.
* Rushed Diagnosis: The dealership may have performed a cursory inspection.
What to Do Next:
1. Get a Second Opinion: Visit a different reputable mechanic, ideally one specializing in Dodge vehicles or older cars.
2. Document Everything: Keep a detailed log of when the problem occurs (e.g., hot engine, after idling, specific driving conditions).
3. Ask About Diagnostic Procedures: Inquire about specific tests performed, such as fuel pressure tests, sensor checks, and vacuum leak detection.
4. Consider Data Logging: Some mechanics can use scan tools to record engine data during the problem's occurrence, providing valuable diagnostic information.
The problem is likely related to fuel delivery or the ignition system, but without more information and proper diagnostic testing, pinpointing the exact cause is impossible. A thorough investigation by a competent mechanic is needed.
