One problem related to ignition coils failure has been reported for the 1998 Lincoln Navigator. The most recently reported issues are listed below.
While driving at approximately 65 mph there was a loud bang coming from the engine area. Also, the engine began to lose power. Driver coasted to the shoulder and applied the brakes. Driver got out of the vehicle and lifted the hood. It was discovered that the 3rd cylinder spark plug blew out of the top of the engine, ripping the cable and the electronic ignition coil. Owner had the vehicle towed back to the dealership.