Hello together, as described in the title my Omega is running 2 – 3 months round in cold condition. Try to write down everything in turn: 1. After starting the engine runs perfectly (as long as you don’t give gas!) 2. Immediately after driving off (and you give gas slightly), the engine runs only on 3 cylinders. As soon as the speed (30, 50 or 70, that doesn’t matter) is reached and you give only so much gas to keep the speed, is the unround motorla 3. But as soon as you have to give more gas, it’s back again, with one restriction: it doesn’t jerk at all over 2500 rpm! 4. After the car has reached the full operating temperature, it’s completely gone. 5. Yesterday, when the operating temperature is reached, the idle speed fluctuates between 1000 and 2500 rpm. Depending on how long the “red phase” lasts, it calms down after a short time, or it goes out. The engine control light is off and it won’t be a mistake. I have already renewed the following parts: spark plugs and ignition cable (from NGK) valve cover seal (candles stood up to the edge in the OIL) crankshaft sensor (last week, it no longer jumped on and has also shown the error) air filter insert camshaft sensor (about 1 year ago) Greeting Bernd