Hi everyone I'm a newbie so apologies If i'm not posting in the right section/format I have a 53 plate A4 sport (multitronic) and I'm having issues with the car picking up speed. I have my foot down fully on the accelerator and the car eventually picks up speed. I have noticed that when I put some of the Forte diesel treatment (injector cleaner) in, the car runs a lot better. could this be a fuel injector issue? It also shakes on idle every now and again......had it plugged into a few diagnostic machines but has not thrown up any codes any help would be appreciated!