I've just had my fiat bravo 165 2.0 sport remapped. Having previously had other diesel cars remapped I took the bravo to a new remapping centre near to me and they blocked off the valve so that the car recognises it when the ignition is first turned and knows it's there but then it remains shut. The previous place I took the other cars to never did this and this caused the egr valve to clog in one car and need replacing.
On this remap I'm now getting about 54mpg which is good considering I'm always late for work. Lol.