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Home >> Porsche >> 1978 >> 930 >> Repair and Diagnosis >> Engine Performance >> Tune-Up >> Tune-Up Procedures - 6-Cylinder >> Ignition Timing >> 1974-76 Models
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1974-76 Models

Warm engine to normal operating temperature. With vacuum hose connected to distributor, adjust ignition timing until pointer is aligned with notch just left of "Z". See Figure. Check advance timing at 6000 RPM with vacuum hose disconnected and plugged.

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