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GMC
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1982
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Magnavan Standard Trans
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Repair and Diagnosis
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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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Condition & Possible Cause
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Engine Lopes While Idling
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Intake Backfire
Intake Backfire
Improper ignition timing.
Faulty accelerator pump discharge.
Improper choke operation.
Defective EGR valve.
Too lean fuel mixture.
Initial choke valve clearance too large.