I have a 1.2 dynamique and for some reason when I drive along and then stop the revs will stay between 2-1500 for a few seconds and then drop. Does anyone know how to fix this/why it's happening? And also my mpg always says 28-29 mpg, but its a 1.2 and I don't thrash it about so if anyone can help with that, that too would be great help! 
