Right, ive cleaned the EGR valve twice and it seems to be fairly free moving but after a day of driving, it starts rattling and you have to put the accelerator to the floor to clear it and get some power followed by a cloud of smoke. Does anyone know what else could be the problem or do i have to suck it up and buy a new EGR valve, if so any suggestions for suppliers (Just got quoted £160 - eek)