The problem is very poor MPG. On short trips it shows 14MPG and on moterway trips, I have no problem with 39MPG. I have just cleaned the EGR and the MAFF (however since cleaning the EGR and the MAFF its now running at 17MPG on short trips) and changed both thermostats. The running temp is all correct and the car runs and sounds smooth. Have run out of ideas, can anyone help please?