Hello All Mercedes Fans,
I own a 1981 W126 300SD car. The engine has been running well until
recently. Now when it heats up (after about 30 to 40 minutes on the
road) the engine has less power, and idles poorly, stalling at times.
Once i rev it up, it seems to fire on all five cylinders.
I have done the following:
1) replaced fuel pre and main cartridge filter about 6 months ago
2) pulled 5 injectors from known good engine and installed them.
Does this sound like an issue with the fuel supply from the tank, or
could i be losing compression? I do have a compression tester.
Engine has probably run for some 300,000 km. Valves were adjusted
last summer. I drive about 10,000 km/year.
Hope to get some input from the experts out there.
Regards / John