Moin, I was on the dynamometer this week to get the result of my “remodeling” on my engine (NG). However, the master said that my ignition system always shifts the ZZP under load towards “late”, i.e. the engine knocks well (ZZP in idle to 16.5 degrees before OT). However, the examiner said that he could not have knocked, otherwise he would have stopped immediately (I don’t know if you can knock the engine with working knock control at all). Now I ask myself what this can be about… The compression of the engine was increased (1mm planned), should I possibly refuel Super Plus instead of Super? The tap sensor is still the first (BJ 1987), can the possibly ne Macke have? It does work in all appearances and as soon as the plug is pulled off, the engine check lamp lights up. I also noticed no holders or any other loose parts on the engine, on which the sensor may react. nndte, however, is anyway a hell of a noise under load with 200 cells Kat and Fox Group A plant with VSD replacement tube [thanks to Audi90Typ89 ]… Maybe someone has had the same experience and could help me with my problem, because I don’t want to go to the test bench all the time to see if the problem is gone… I still have to mention that I don’t actually notice that suddenly performance is missing… Thank you Sebastian