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			Your engine control unit (ECU/DME) is the learning type.  It takes a few hours of driving for it to learn the air/fuel curves for your particular engine and driving style.
 The car can also go into limp home mode for a number of reasons, but I think it limits RPM to 3000 in that situation.
 
 -james
 
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 '01 Boxster S, 51k miles
 '05 Mazda 6 Grand Touring Wagon
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