Speed only slows down / hangs briefly when switching or domes

Hello, my Leon Cupra BJ 2007 spins the speed since the latest. As soon as you walk off the gas, no matter if you are coupled or uncoupled, the car still gives gas independently. So the speed decreases more slowly when you couple, than normal, partly still hangs something etc. The car is connected accordingly later on from the gas than you actually do with the pedal. The speed is sometimes not at 800 rpm, but partly at 1000 rpm, hangs there for several seconds, It’s always a bit different, but not as it should be. If the car is cold, it actually runs correctly. The warmer it gets, the more the error occurs and after 30min drive it is “the worst”. Sometimes you stand at the traffic light and at once it regulates slightly up to 1500 rpm and then down again. Had the car in the meantime in the workshop. The throttle valve was removed and cleaned, but that didn’t have anything to do with it. The workshop doesn’t really know any advice, so I ask again here. Errors are: P1093 Fuel measurement system Bank 1 2 Misfunction implausible signal Error Test cycle complete sporadic error Error would cause no lightening of a warning lamp P0507 Idle speed control Speed exceeded over set value upper limit Error Test cycle complete sporadic error Error would cause no lightening of a warning lamp De r P0507 is probably gone after the redevelopment of the throttle valve, but the workshop does not know any advice about the P1093 either. Has anyone had an idea or the problem before? What can be definitely excluded or what can one narrow down? Thanks already and many greetings!