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Chevrolet
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1987
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Astro Van Passenger, Standard
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Repair and Diagnosis
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Engine Performance
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Adjustment
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Tune-Up - V6
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Adjustments
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Distributor
Tune-Up - V6: Adjustments: Distributor
All models are equipped with Delco HEI-Electronic Spark Timing (HEI-EST) distributors.
Fig 1: 2.8L Firing Order & Timing Marks
Fig 2: 4.3L Firing Order & Timing Marks