Reduced Engine Performance at High Ambient Temperatures – 2015-2016 Subaru STI

NUMBER: 11-163-16 DATE: 04-15-16 APPLICABILITY: 2015-16MY STI Models SUBJECT: Reduced Engine Performance at High Ambient Temperatures   INTRODUCTION This bulletin announces availability of reprogramming files for optimization of the ECM.  The files will address customer concerns of a lack of engine power output resulting from reduced turbocharger boost at high ambient temperatures while using 91 octane …

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