Hello, for a few weeks now my T4 has been jerking from 3000 rpm, are like several detonators and then he suddenly shoots forward. The more gas you give the stronger he jerks. If I only tap the gas then it accelerates well and smooth. The problem rather occurs in higher corridors, say on the highway I have no fun at the moment. Error codes are not stored, the petrol filter I have already replaced. Where else I have read that you can avoid this problem with original spark plugs, I will also try that. I also had to check before the ignition coils and if necessary with shrink hose to improve the insulation. Now to my question, what must I pay attention to with the ignition coils, where do they tear for usual. And where do you place the insulation. I have found nothing about that so far. And maybe someone still has a good idea. Greeting, Niko