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Nissan-Datsun
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1991
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Sentra SE-R
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Repair and Diagnosis
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Engine Performance
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System
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Engine Controls - Tests W/O Codes
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Symptoms
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Poor DRIVEABILITY
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Surge
Poor DRIVEABILITY: Surge
Enter self-diagnostic Mode II and monitor exhaust gas sensor operation (fuel metering system operation on Maxima, Pathfinder and Pickup V6).
Check EGR control valve operation.
Try a known good ECU.