Clio RXE 1.6 Autom. Built 99 goes out within about 1 hour drive 5-6 times when I am standing at the traffic light

Hello, I have the following problem. My Clio leaves within about 1 hour drive 5-6 times always when I stand at the traffic light.So foot on the brake (automatic) It starts immediately and the ride continues until the next time.It only bothers. So far the following was done: ignition cable, candles, battery, both ignition coils, everything about 1 year ago. After that came the OT-Geber, now also also lamda probe, idle control and the throttle valve was cleaned, however only from above, without removal. Problem best In the winter he ran around. Everything around the gas supply I exclude, because he also has a gas system and there the same happens.In the error memory nothing is inside.I have to say, personally I do not have the big idea, I have everything in my friendly done. Does anyone have a hint, what it can lie on? I would hate to give up the car, because it is comfortable to drive well (if he can drive well) run round) in spite of the age is top in shot, rust missing. I thank you already in advance.