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#2: 02-28-2013, 08:42 PM
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A consistent negative correction in the higher ranges may indicate a boost leak. A negative learning value means the ECU is pulling fuel because of a perceived rich condition. Other possibilities besides a boost leak would be a bad MAF or front o2 sensor. Generally, a/f learning #1 should be within -/+5%.

Try resetting the ecu and drive around for a few days, then see if the learning view is the same.
335HP/360Tq VF-22/1820 clone with Meth