Possible Causes:
* Crankshaft Position Sensor (CKP Sensor): This sensor tells the engine's computer where the crankshaft is in its rotation. A failing CKP sensor can cause the engine to stall, especially under load (like acceleration). This is a very common culprit in this type of problem.
* Mass Airflow Sensor (MAF Sensor): This sensor measures the amount of air entering the engine. A faulty MAF sensor can provide incorrect information to the computer, leading to poor fuel delivery and stalling.
* Throttle Position Sensor (TPS): This sensor tells the computer the position of the throttle plate. A malfunctioning TPS can cause erratic engine behavior, including stalling.
* Ignition System Problems: Worn spark plug wires, a failing ignition coil, or a bad distributor cap and rotor (if your Taurus has a distributor) can interrupt the spark, causing the engine to cut out.
* Fuel Pressure Regulator: This regulator controls fuel pressure in the system. A faulty regulator could be causing low fuel pressure when you accelerate. You'll need a fuel pressure gauge to check this.
* Fuel Pump (despite replacing the filter): While you replaced the filter, the pump itself could be weak or failing, especially if it's the original. It might provide enough fuel at idle but struggle under load.
* Wiring Issues: A short circuit or corroded connection in the wiring harness related to the fuel system, ignition system, or sensors could be causing intermittent failures.
Troubleshooting Steps:
1. Check Engine Light: Is the Check Engine Light on? If so, get the codes read using an OBD-II scanner (AutoZone and similar parts stores often do this for free). The codes will point you towards the most likely culprit.
2. Visual Inspection: Look for any obvious signs of damage to wiring, vacuum hoses, or connectors near the fuel system, ignition system, and sensors.
3. Test the CKP Sensor: This is often the most likely culprit. There are tests you can do, but often replacing it is the easiest solution due to the relatively low cost of the part.
4. Test the MAF Sensor: Cleaning the MAF sensor with MAF sensor cleaner can sometimes resolve issues if it's just dirty. However, if cleaning doesn't fix it, replacement is likely needed.
5. Test the TPS Sensor: Similar to the MAF, cleaning might help, but replacement is often more effective.
6. Check Fuel Pressure: You'll need a fuel pressure gauge to check if the fuel pressure is dropping under acceleration. This requires a bit more mechanical knowledge or access to a mechanic.
7. Inspect Spark Plugs and Wires: Check the spark plugs and wires for wear and tear. Replace them if they are worn or damaged.
Recommendation:
Start by getting the OBD-II codes read. This will greatly narrow down the possibilities. If you're not comfortable performing these tests yourself, take your Taurus to a trusted mechanic. The problem is intermittent, making it difficult to diagnose without diagnostic tools and a systematic approach. Ignoring the issue could lead to more serious damage.
