Hello! I’m new here but for eleven years or so happy 850-driver. 2.0 10V / KME Diego Gasanlage / 290000 km I have the following problem: As soon as the car comes to temperature, the idle run becomes very restless. It turns further at 800 1/min but sounds like it doesn’t fire on all cylinders. “Wupp wupp wupp”, that sounds like that. The whole car is swinging in time. Also, it turns involuntarily high when giving gas. During the ride everything runs inconspicuously. There are no fault codes in the Blinkbox. Since I have already used the search function excessively, I have done the following things in the last days. Unfortunately unsuccessful. Worth mentioning is the following: The last two points cause me quite stomach pain. Does that mean, for example, that the cylinder head seal or any other capital is in the ass? What else can I try? How can I reliably examine the vacuum lines for leaks? If it is the ZKD, how do I get certainty?