TYPE OF STUTTER/STUMBLE
Steady throttle/Increasing throttle/Both: I generally see it at low throttle inputs from about 2,000 and up. This happens in all gears and all the time. Hesitates and stumbles. Always pre-boost.
MODS
Intake: Stock
Exhaust: GS Uppipe and COBB DP
Fuel: Shell 91
Turbo: IHI VF40 and Grimmspeed EBCS
Engine Management: Stock
Tuner and revision of tune(if you don't mind): Cryotune Stage 1 Rev: Final - test and now Cryotune Stage 2 w/EBCS Rev - 4
MAINTENANCE
Sensors changed: None yet
Plugs changed: 20 miles ago - factory
Coil Packs changed: N/A
OTHER SYMPTOMS
Check Engine Light: None
Etc:
RESULTS
What has and hasn't worked for you: I have done a tune, belts, air filter, oil and filter, plugs, compression test.
If something worked, how long has it been working for: So far nothing.