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Chevy Truck
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1987
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Suburban 1/2 Ton 2WD V8-305 5.0L
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Repair and Diagnosis
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Powertrain Management
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Tune-up and Engine Performance Checks
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Distributor
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Specifications
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Distributor Timing Advance
Distributor Timing Advance
The Control Module advances or retards the spark. If the base timing is set incorrectly, the engine spark curve will be incorrect.