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Home >> Nissan-Datsun >> 1976 >> 280Z Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Ignition System >> Spark Timing Control System >> Testing >> Spark Timing Control System >> 1975-76 280Z Models
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1975-76 280Z Models

  1. Inspect cap, rotor, and distributor pick-up coil air gap. Clean adjust, or replace components as necessary. Adjust air gap to 0.008 - 0.016" (0.3 - 0.4 mm).
  2. To check phase difference on dual pick-up distributors, disconnect Red wire from coolant temperature switch and ground wire. With engine at 800 RPM (700 RPM with auto, trans, in Drive), adjust timing to 13 degrees BTDC.
  3. Disconnect Red wire from ground and check ignition timing. Timing should be 7 degrees BTDC at 800 RPM (700 RPM with auto, trans.), which equals a phase difference of 6 degrees.
  4. If timing is not as specified, loosen distributor adjuster plate screws and turn adjuster plate until correct specifications are obtained. Each graduation on adjuster plate is equal to 4 crankshaft degrees. After adjustment, reconnect Red wire to coolant temperature switch.
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