[M-Simon]

Hi Guys,

 
I need your advice please, after more than 1 year of diagnosis and part-changes of my F13 N63 Engine (408 HP Version -new engine in 2016 current km= 100.000).
 
The engine is starting to slightly shudder when it is hot and in higher gears with low RPM.
-No problems when the engine is cold
-No problems when the engine is in sport mode

 
I have already exchanged so many parts without success, that I am feeling (I am!) an idiot!
 
-Coils
-Spark plugs
-Air mass sensors
-Lambda Probe before Catalytic converters
-Lambda Probe after Catalytic converters
-No fault codes in ISTA
-No errors with ABL misfire detection
-No engine leaks
-New Torque converter
-Injector Cyl. 8
-Emission test on both banks
-Timing Chain is ok
-New Crankshaft Position Sensor
-New Vanos Solenoids

 
The smooth-running values in idle are bad (from my point of view for all injectors, but the car does not shudder until it is hot and driven in high gears with low rpm and only just a little acceleration.
Do you have any idea what I can do next?
 
Thanks a lot for your help!