After the engine control light has been shining for a couple of weeks and then not again, and the engine after cold start jerks for a few seconds, bangs and dies, I decided to start an attempt to clean the throttle valve. I would have a few questions to the GDI experts: What is the effect of the coking on the throttle valve? Or otherwise asked: how does the electronics notice that there is something lazy? Will the flap become difficult? Lots of coal was not on the flap. The question is where to clean particularly well. Since the flap is closed at “detonation” yes, you can not clean the particularly coked back. Can one open the flap “violently” or take this damage then? Because of the actuator etc. Have I now helped with “detonation” and hammer on the gas pedal. and then carefully cleaned with long cotton swabs. Isopropanol went very well.