gaethzac000 Posted June 25, 2017 Share Posted June 25, 2017 I have a 2006 Legacy GT SpecB with COBB downpipe and full exhaust with COBB Stage 2 tune from Accessport V2. Lately I have noticed that when I accelerate around 2-3000 rpm the car stutters but continues to accelerate, vibrating the car, and lacks in power throughout power band. So far, we have searched for vacuum leaks from the top of the engine bay and did not find anything. As well as checked air filter and mass airflow sensor. We also plugged in the Accessport and went for a drive, monitoring boost, and would peak at 9.6 pounds of boost. All fluids seem to be normal so I am trying to get some feedback as to what my problem may be before I take it in and spend a bunch of money for someone to figure it out. Thanks for the help! Link to comment Share on other sites More sharing options...
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