* Wiring issue: The wiring between the distributor and coil may be loose, damaged, or corroded. Check the wiring for any signs of damage and ensure it is properly connected.
* Bad coil: The coil itself may be defective. Test the coil to see if it is functioning properly.
* Bad ignition module: The ignition module may be faulty. Test the ignition module to see if it is sending power to the coil.
* Faulty distributor cap or rotor: Even though you have replaced these, they could still be faulty. Check to make sure they are installed correctly and that the contacts are clean and free of corrosion.
* Other electrical issues: There may be other electrical issues in the vehicle that are preventing power from reaching the coil. Check the battery and electrical system to ensure they are functioning properly.