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BMW
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1998
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528i Automatic
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Repair and Diagnosis
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Engine Performance
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System
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Engine Controls - Trouble Shooting - No Codes
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Symptoms
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Engine Backfires
Engine Backfires
Air leak into/from exhaust system.
Intake manifold vacuum leak.
Burned valve.
Lean air/fuel mixture.
Incorrect ignition timing.
Incorrect valve timing.