* Distributor Internal Components: The most likely culprit is a faulty ignition module (often built into the distributor on older Dodges). The module receives the ignition signal and controls the coil, which in turn creates the spark. A failing module is a common reason for no spark at the plugs, even with good power going in. You'd need to test the module (often requires a multimeter and some knowledge of automotive electrical systems) or replace it.
* Pick-up Coil (or Pickup): This component in the distributor senses the position of the rotor and triggers the ignition module. A faulty pick-up coil won't generate the signal to fire the module. This is another component that requires testing or replacement.
* Distributor Shaft: Check the distributor shaft for wear or damage. If the shaft is worn or bent, it can prevent the rotor from properly spinning and distributing the spark.
* Rotor and Cap Installation: Double-check the rotor and cap installation. While you say they're new, a slight misalignment can prevent proper spark distribution. Make sure the rotor is correctly seated and aligned with the distributor shaft and the cap terminals are making good contact.
* Ignition Coil (Less Likely): While you say you have spark *at* the distributor, there's a small chance the coil itself could be weak. It might be producing enough spark to get to the distributor, but not strong enough to jump the gaps at the plugs. This is less likely given you've got a signal getting *into* the distributor.
Troubleshooting Steps:
1. Visual Inspection: Carefully examine the distributor's internal components for any visible damage or wear. Look for burnt areas, loose connections, or anything out of place.
2. Testing with a Multimeter: If you have a multimeter and are comfortable with automotive electrical testing, you can test the ignition module and pick-up coil according to your car's specifications (a repair manual will be very helpful here).
3. Professional Help: If you're not comfortable testing the electrical components, it's best to take your car to a mechanic. Diagnosing this type of problem without the right equipment and knowledge can be difficult and time-consuming.
Remember that working on automotive electrical systems can be dangerous. Always disconnect the negative battery terminal before starting any repairs to prevent accidental shorts. If you're unsure about any step, consult a repair manual or seek professional help.
