Something happened to my 2009 scooby during last couple of weeks. The symptom is that between 2800 and 3000 rpm the car is struggling to accelerate smoothly when doing it in gently or when accelerating with cruise control. If I try driving with constant speed around that rpm range (e.g. 120km/h is somewhere around 2900 RPM on VI gear) - it feels like it was missfiring - cruise control is struggling to keep constant speed at this RPM.

No problems at WOT. Goes like crazy... nothing changed here

EJ257, AEM intake, stage I mods (incl. milltek exhaust and open downpipe + ecutek racerom)

...and just turned 33333