Since you've already replaced the ignition coil and still have no spark, the problem lies elsewhere in the ignition system. Here are some things to check:
* Ignition Module (or Ignition Control Module - ICM): This is a common failure point on older Fords. It's the component that controls the ignition coil. A faulty ICM won't send the signal to fire the coil.
* Crank Position Sensor (CKP): This sensor tells the computer the engine's rotational position. Without this information, the computer won't send the signal to fire the coil.
* Cam Position Sensor (CMP): Similar to the CKP, but for the camshaft. Also crucial for proper timing and ignition.
* Ignition Switch: While less likely, a faulty ignition switch could prevent power from reaching the ignition system.
* Wiring: Check all the wiring between the ignition switch, ICM, coil, and sensors for breaks, shorts, or corrosion. This includes the ground wires.
* Distributor (if applicable): A 1996 Taurus might still have a distributor, depending on the engine. Inspect the rotor, cap, and wires for damage or wear. If it's a distributorless ignition system (DIS), skip this step.
* Computer (PCM): In rare cases, a faulty PCM could prevent the ignition system from functioning correctly. This is usually diagnosed through more advanced testing.
Troubleshooting steps:
1. Check for power at the coil: With the key on, use a test light or multimeter to check if power is reaching the coil's positive terminal. If no power, trace the wiring back towards the ignition switch and ICM.
2. Check for a good ground: Ensure the coil has a good ground connection.
3. Test the CKP and CMP sensors: These usually require a scan tool or a multimeter with the proper knowledge of the testing procedure. This often involves checking for specific voltages or waveforms.
4. Test the ICM: These can be tested with a multimeter, but often require specialized equipment or knowledge.
You might need a multimeter and potentially a scan tool to properly diagnose the issue. If you're not comfortable working with automotive electrical systems, it's best to take it to a mechanic. Attempting further troubleshooting without the proper tools and knowledge could potentially damage other components.
