Hi allan hopefully this time it will have worked, basically the vehicle has been left with me for a week with a serious lack of power and lots of excessive black smoke when driving it into the workshop suspected a problem with either afm or egr so dived straight in and took off the egr valve to find the pictures above so replaced egr and inlet manifold as this was coked up bad as well cleaned all intake system thoroughly and car is now fine fault codes when i cleared them all associated to egr, turbo boost and afm my question is that i seem to change quite a few egr valves but have never seen on this bad so want to try and make sure i prevent this from happening again but can`t seem to find any faults since the repair.
tia