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Porsche
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1990
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911 Carrera 4, 2D Convertible
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Repair and Diagnosis
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Engine Performance
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Engine Controls - Specifications
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Ignition System
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Firing Order & Timing Marks
Firing Order & Timing Marks
NOTE:
For location of ignition timing mark, see
ADJUSTMENTS
article in the ENGINE PERFORMANCE Section
Fig 1: Firing Order & Distributor Rotation (Double Ignition System)