Zaverho
New Member
- Joined
- Jun 10, 2019
- Messages
- 4
- Reaction score
- 0
- Your Mercedes
- W203 270 CDI 2005, W124 300TE 1991, W114 230.6 1971
Hi,
I have a Mercedes C class, 2005, 270 CDI with 390.000 km. I know, a lot. But I love the car and the interior is gorgeous
The problem:
When accelerating there is a lot of black smoke comming out of the exhaust. Even a fast rev in park would create a cloud of smoke. Sometimes the check engine light turn on and it goes in limp mode. There is a fair amount of power when not in limp mode. Shifts fine. A lot of oil in boost pipes and EGR.
The work allready done:
-Head renewed, with seals, polished valves and whatnot.
-New original intake manifold and flap motor (last thing I did - at the stealership - the test showed low boost pressure and leaking sistem. No change in smoke situation)
-New EGR valve (when I bought the car the EGR was disconected as it was not working)
-Injectors check and set, new seals
-New filters, plastic fuel hoses
-All 3 boost pipes checked for cracks
-All rubber vacuum hoses replaced
-MAF cleaned and engine tested with a known good unit with no difference
Signs that might help solving the riddle:
-oil is collecting around oil cap
-connector at vacuum pump is broken but stays on
-I havent yet tested the compression
Suspects at the moment:
-Turbo actuator
-Turbo
Where should I go next? Any ideas would be more than welcome...
I have a Mercedes C class, 2005, 270 CDI with 390.000 km. I know, a lot. But I love the car and the interior is gorgeous
The problem:
When accelerating there is a lot of black smoke comming out of the exhaust. Even a fast rev in park would create a cloud of smoke. Sometimes the check engine light turn on and it goes in limp mode. There is a fair amount of power when not in limp mode. Shifts fine. A lot of oil in boost pipes and EGR.
The work allready done:
-Head renewed, with seals, polished valves and whatnot.
-New original intake manifold and flap motor (last thing I did - at the stealership - the test showed low boost pressure and leaking sistem. No change in smoke situation)
-New EGR valve (when I bought the car the EGR was disconected as it was not working)
-Injectors check and set, new seals
-New filters, plastic fuel hoses
-All 3 boost pipes checked for cracks
-All rubber vacuum hoses replaced
-MAF cleaned and engine tested with a known good unit with no difference
Signs that might help solving the riddle:
-oil is collecting around oil cap
-connector at vacuum pump is broken but stays on
-I havent yet tested the compression
Suspects at the moment:
-Turbo actuator
-Turbo
Where should I go next? Any ideas would be more than welcome...