Mondeo mk3 boosting problems

[Bazz92]

Hi first time ford owner 

I have a mondeo mk3 2002 zetec s 2.0 tdci it was running fine on a run when I went to do the run home there was no boost from it then a few days later it was working fine again for that day then when I was driving I went to overtake and nothing until you get to about 2.5/3k revs and it's only just boosting and quite smokey I can't see any splits in the pipes and there is no lights on the dash.

any advice would be helpful thanks