Hello, my Audi 80 B4 2.0E, built in 92 with 85 kw, automatic and 175,000 km, shows an unpleasant phenomenon lately. Always after about 270 – 280 kilometers driven he starts to jerk strongly and takes only sporadic gas. That has always happened up to now in or after construction sites, i.e. at 60 – 80 km/h. He then jerks down to 20 km/h, then he takes gas again up to 100 km/h and so the rest of the route goes. In short distance traffic he runs however I was now in an Audi workshop, which unfortunately could not find the error. The diagnosis was: Ignition coil tested – perfect tank is made of plastic – so no rust injection system ok Lamda control and temperature sensor ok throttle flaps ok spark plugs ok Does any of you have another tip where to look further?