Hi, Just fitted a new maf and still haveing the same problem with spluttering and generaly not running smooth (when I disconect it works better without it). I have not reset the engine managment light yet as my code reader isnt working. Basicly should the new one work even though the code has not been reset from the previous fault? or could it be the egr valve? Even though when I disconect the maf it runs fine. cheers.