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Home >> Mercury >> 1973 >> Comet 4.1L Eng VIN L, Automatic Trans >> Repair and Diagnosis (Single Page) >> Engine Mechanical >> Auxiliary Emission Control Systems >> Transmission Regulated - Spark Control >> System Test >> Notes
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System Test: Notes

With a vacuum gauge connected between distributor and distributor modulator valve and temperature switch known to be above 65°F, proceed as follows: