Hi All, Nowadays most modern
diesels come with some from of Particulate Filter to catch/trap those nasty unburnt hydrocarbons. The system is extremely clever as it regenerates/cleans itself out. If you want to have a read of how it actually works, what happens when you have one on your car, then take a look here: http://www.mrexclusive.co.uk/how-it-...filter-syst em/