2.0d running lumpy when warm

[marty599]

Hi, I have a 2004 2L classic, The car seems to idle fine and ok, but when ive been driving for about 10 mins or so, especially when im in top gear it seems to lack power and is unresponsive for a few secs, it feels like it is missing. I have replaced the fuel filter but it seems to have gotten worse. It does smoke a bit when i rev it up (black smoke) and when I put my foot down. Any Ideas Guys what could be causing the problem? Many Thanks. Marty

 

[martyz]

Maf is on it's way,fueling issue,black smoke=unburnt fuel.Get the codes read at an Mb indie
for a positive diagnosis.

2.0d? petrol surely.