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Home >> Chevrolet >> 1983 >> Chevy Van G10, 5.0 H, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Vacuum Advance Spark Control System >> Description >> Spark Vacuum Delay
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Spark Vacuum Delay

The spark vacuum delay is used on 5.7L V8 engines with Heavy Duty Emissions. It is installed between TVS check valve and distributor.