Moin, I drive my Audi 100 with KE3-Jetronic on pure E85. Unfortunately, the car stinks in idle and lower speed range, so all ahead while maneuvering in parking lots, quite pathetic from the exhaust, although the wide-band probe Lambda 1.1 or even leaner reports. I had renewed the injection valves for exactly the reason 2 months ago. At the old ones on the nozzle heads already a thick layer of the black grease was attached. With the new nozzles the smell was a long time ago. eg, but unfortunately I’m beginning to notice it again. My guess is: The deposits deteriorate the spray image so strongly that no finely distributed fuel arrives in the combustion chamber. The fuel residues in the exhaust gas are smelly. Unfortunately, you have to unscrew the half suction tube with the engine to get to the nozzles. This is annoying in several ways, because you also have to pop off all kinds of rubber hoses and hats, which have now already 25 years on the hump and it surely at some point with tore thanks if you do it too often. Long talk, short sense: Has anyone had any experience with any additives that you pour into the tank, which dissolve the crumb again? Does the stuff dissolve when you fill up gas every now and then? Greetings