I have the JB4 tune set to map 5 - bone stock otherwise. I have a N54 motor and im getting major stutter when im entering boost after my motor warms up. Noticed slight hesitation b4 its about to boost, almost feels like if your were not fully letting go of the clutch... So i get an engine light right away then stutter - turn off the map, a few mins later stutter feel dies out engine light goes off and the car runs fine.
Where im at now with this, tried it one more time today with map 5 - same issue - now my engine light wont go off.
Anyone else with this issue? Any suggestions?