Mine does this too, I just figured it needs carbon cleaning considering it has almost 74k miles and has never been done.
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2009 135i 6MT jb4, ER CP, Tial BOV, 7" VRSF FMIC, BMS DCI, BMS 91 Pump flash running 35% e85
09 G8 GT
05 GTI 1.8T 5spd
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