MOTORCRAFT DURASPARK II Electronic Ignition: Precautions

Since the electronic control module and ignition coil are powered whenever the ignition switch is in the "RUN" or "START" position, the system will generate a spark whenever the ignition is turned off. This feature may be used as a diagnostic tool to check for continuity of circuit, coil and ignition switch.

A spark may occur if distributor cap is removed with ignition on, keep ignition off during under-the-hood operations, unless you plan to start the engine or perform a test requiring ignition to be on. This will prevent accidental engine rotation during service or test procedures.

Silicone dielectric grease must be applied to all insulating areas at distributor, coil and spark plug boots. To help prevent radio frequency interference, coat the entire brass rotor tip with silicone dielectric grease to a thickness of 1/32" (.75 mm). DO NOT remove this grease, even if discolored, as grease will maintain its insulating properties.

A 3/4" (18 mm) clearance must be maintained at distributor cap mounting edge, spark plug wire terminals and coil tower to prevent high voltage are to ground. When replacing spark plug wires, be sure to use the specified replacement wires. When removing distributor cap and adapter, always remove the cap first, then the adapter.