Moin, have problems with my Audi Cabrio NG! The engine only turns up to 3200 rpm! When it reaches 3200 rpm it starts to boom and starts to shake! Last year the Lamdo probe was made new! Have already cleaned the crankshafts and the throttle flap but no improvement! I already drove with clamped Lamda but also no improvement! Spark plugs , cables and ignition distributors are new! What else can that be! Greeting Stefan