I'm an owner of a 1991-built 190D (75HP) with now 180.000km.
In the last few weeks i'm having a problem with my engine:
Every time, i start it cold and drive up a hill behind my house, stop
there at a traffic light it seems to run only on 3 or 2 cylinders. The
engine is stuttering (but it does'nt turn off). When i push the
accelerotor pedal it works fine, although I think it's a little bit
"nailing" more than normal at this time. When I drive then a few hundred
meters and stop again, the engine is working fine.
When i start and drive on a flat street (need no high power to get up
the hill) it works without problems.
Also when the engine is hot and i drive up the hill, it works fine.
At the repair station they didn't know what the problem could be. They
told me to try changing the valve that prevents the fuel to return to
the fuel tank from the injection pump. But unfortunately it didn't help.
Did anybody have a similar problem with that engine ?
Apart from that problem the engine works fine. I do not have any
problems with the power of the engine.
Thanks for suggestions!