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GMC
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1982
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Magnavan Standard Trans
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Repair and Diagnosis (Single Page)
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General Information
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Basic Trouble Shooting
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Gasoline Engine Trouble Shooting
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Diesel Engine Trouble Shooting
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Condition & Possible Cause
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Engine Starts and Idles Rough Without Abnormal Smoke or Noise, but Clears After Warm-Up
Engine Starts and Idles Rough Without Abnormal Smoke or Noise, but Clears After Warm-Up
Injection pump timing incorrect.
Engine has not fully broken in.
Air in fuel system.
Injector nozzle malfunction.