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Home >> Porsche >> 1981 >> 928 Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Tune-Up >> Tune-Up - V8 >> Ignition Timing >> Notes

Ignition Timing: Notes

  1. With engine at normal operating temperature, disconnect and plug hoses at distributor advance unit. Stop engine and connect timing light to No. 1 cylinder and tachometer to connection stud above ignition control unit in engine compartment.
    CAUTION: Dangerous voltage exists on primary and secondary side of entire ignition system as well as wiring from ignition control unit to tachometer, plug connections and any testing equipment connected. Ignition must be off when attaching or removing testing equipment, or severe shock may occur.
  2. Start engine and increase speed to 3000 RPM. Timing should be as specified. Adjust if necessary by turning distributor. Return engine to idle and connect vacuum hoses. Timing should now read TDC to 7° BTDC. If not, distributor should be removed and tested.
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