I know it's not a fiat but it's a fiat engine, I've got a 2009 vauxhall combo van 1.3 cdti and at 1500rpm it has a a real hiccup in power , it's showing no fault codes ,I took it to my mates the other day (AA man ) he revved at fairly hard a couple of times and it stopped doing it for a few days , he suggested it could be injectors ? Please any advice is welcome it's breaking me :-(