The Dura-Spark II distributor eliminates conventional mechanical and vacuum advance mechanisms. See Fig 1. All timing is controlled by the ECA, which is capable of firing spark plugs at any point from TDC to 60°BTDC. This flexibility in spark range requires greater separation of adjacent distributor cap electrodes to prevent cross-fire. A bi-level distributor and cap may be used. In the bi-level design, both the rotor and cap have upper and lower electrodes. As the rotor turns, one of the high-voltage electrode pickup arms aligns with one spoke of the distributor cap center electrode plate, allowing high voltage to pass from the plate, through the rotor to a terminal on the distributor cap and on to the spark plug.

NOTE: Numbers, corresponding to spark plug wires, are molded into the cap for identification. Due to design, however, the wires are NOT arranged in firing order. The actual firing order is 1-5-4-2-6-3-7-8, as noted on the intake manifold. If an aftermarket cap is installed, use original cap as a guide to reference spark plug wire locations

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

DURA-Spark II Ignition System

Use the Manual With the Right Hardware

When to See a Mechanic

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