My truck is a 2012 with 35k on it, and I just installed the Edge CTS touch screen tuner and what a difference this thing makes. Now when running maybe half throttle, I can hear the BOV before the transmission shifts. It dumps boost at about 2400-2700k rpm, and then it picks it right back up. It this a wastegate issue and need to upgrade the spring or what's the deal? I think if this issue is corrected the power band would be more smooth.
It sounds like torque modulation. This is a factory feature that cuts boost and timing during the shift to save abuse on drivetrain parts.... It is usually disabled via tuning device
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