DURA-Spark II System Precautions
Since the electronic control module and ignition coil are "ON" whenever the ignition switch is in the "ON" or "START" position, the system will generate a spark whenever the ignition switch is turned "OFF". This feature may be used as a diagnostic tool to check for continuity of circuit, coil and ignition switch. Some testing precautions follow:
CAUTION:
Since a spark may occur if distributor cap is removed with switch "ON", keep switch "OFF" during underhood operations, unless you plan to start the engine or perform a test requiring the switch to be "ON". This will prevent accidental engine rotation during service or test procedures.
NOTE:
Silicone dielectric grease must be applied to all insulating areas at distributor (not on cap or rotor, if vehicle is equipped with FM radio), coil and spark plug boots.
NOTE:
A 3/4" clearance must be maintained at distributor cap mounting edge, spark plug wire terminals, and coil tower to prevent high voltage arc to ground.
NOTE:
When replacing spark plug wires, insure wire made of the same material is used for a replacement. Silicone/Silicone wire can be identified by the letters "SS" appearing on the wire in WHITE lettering. Silicone/EPDM wire can be identified by the letters "SE" appearing on the wire in BLACK lettering. The "SS" wire is used on cylinders subject to very high engine temperatures.
NOTE:
When removing distributor cap and adapter, always remove the distributor cap first, then the adapter.