2007 Mercedes ML 320 CDI: No Power, Slow Acceleration, EGR Valve & Possible Injector Issues

Question

Hello I have a problem with the 2007 Mercedes ML 320 CDI. Auto after reading errors by SD, there is no engine related error and no power. All parameters seem to be normal to me. Can the injectors be damaged and the computer does not indicate any error? The car spins to 3000 revolutions and...

osi bis · Answer

Have you changed the air filter or something else before?

autoas · Answer

All this data is for idling, and then what happens?

Mateusz1560 · Answer

The vehicle's data at revs is no longer achieved.

Air and fuel filters are replaced. We blocked the blades in the collector so that they were open all the time.
One injection overflowed much more than the others - we changed the injection and no changes.

Can you help me interpret the data in black from the photo? These values are not valid.

Mateusz1560 · Answer

We are still looking for a solution to the problem.

The SD shows that the voltage on the dosing control valve (Y94 is on the fuel pump) should be 11-14 V when the ignition is turned on, after measuring it is 4 V. After connecting the pin 1 to the plus in the car, the voltage is 9 V, and the pin 2 voltage to ground is 12 V. The cube is 2-pin, pin 1 is signal. We released a new wire from the controller to pin 1 - no changes.

Could the driver be damaged in this case?

xyro · Answer

Clogged exhaust or dead turbo. Does the rotor rotate in your fingers at all? What boost pressure is it?

misiek14051990 · Answer

and it is not a coincidence that the turbine is overcharging? and cuts it off?

Mateusz1560 · Answer

The exhaust is empty, no catalyst and no particulate filter.
The turbo works, but the boost pressure on the load is about 1800 hpa, and it has about 1300, i.e. it reloads. What could be causing this?

I would like to add that the car does not turn into more than 3000 revolutions.

misiek14051990 · Answer

the adjuster (bulb) of the turbine can be adjusted, i.e. it is enough to turn it to the right position.

Mateusz1560 · Answer

Everything in this car is electronically controlled, also here it is controlled by electronics, Do you have any other ideas?

adam.1.1 · Answer

E.g. this there is a turbine from such a motor, I could not move the blades.

Mateusz1560 · Answer

And did this electronic actuator move you at the time of being controlled by the controller? I would not like to disassemble the turbocharger.

adam.1.1 · Answer

Yes, but only after disconnecting from the "barbell" 270tkm engine, by the way, I made resonant flaps because one of them got stuck on the burner and bent into a banana, I regenerated their mechanism and replaced the adjuster, because the stark was screaming that there were excessive resistance on it and 5 candles incandescent lamps turned out to be burned. The flap adjuster is full of engine oil, but after flushing, the error of the flap resistance returned - after replacing approx.
If you do not want to do it, give the car to the mechanic, nice and quick work, so he will be happy.

Mateusz1560 · Answer

So that's not it, because my regulator works without removing the barbell and there is pressure, and there is no error related to the engine.

I am a novice mechanic myself, the problem has been consulted with several specialists and the cause still cannot be determined.

jurekk55 · Answer

Because SD did not give an error on the plate? Have you looked through the status list of the controls and information?

Mateusz1560 · Answer

Yes, at the top they are given in the attached photos, we already lack ideas.

The only thing that seems to me is the lack of proper control of the dosing control valve, also the problem described above. Or someone removing the diesel particulate filter made a mess. The car was imported in this condition.

jurekk55 · Answer

Where do you have info about the status of the clutch switch? Works correctly?

Mateusz1560 · Answer

Which clutch switch? Here's an automatic gearbox.

fuelinyourblood · Answer

What is happening with the flow, the pressure in the suction wheel, what about the egr, what is the fuel pressure at the stop?

Mateusz1560 · Answer

Air mass idling 450 - max load 690
Suction pressure idling 994 - max load 990
Fuel pressure idling 250 - max load 700
Injection dose: idle 7.3 - max load 11 - (the dose is too small)

However, the EGR valve positioner is not working. The valve is closed all the time, could it prevent the car from turning to more than 3000 revolutions?

jurekk55 · Answer

So check if it recognizes 'P' and 'N' correctly For some reason it cuts the power, it doesn't have to be an OBD error

baadbooyy · Answer

hello, did you solve the problem? because I have the same symptoms ..

Mateusz1560 · Answer

It turned out that in Germany the silly program was uploaded to the controller. The car had a badly worn engine, and a damaged turbine twisted so that it somehow worked together with this program for the controller.

baadbooyy · Answer

and what did you upload another program and everything was ok?
I have w211 320d the car is also brought, it had over 300,000 invaded, but it was going perfectly almost a month before I drove in Poland and it drove normally and here I suddenly start and there is no power at a standstill, max 3,000 rpm and not going ...
and sometimes when I turn it off and start it, it goes normally ...
there are absolutely no errors on the new turbo engine ..

Mateusz1560 · Answer

I was not able to upload a new software, so the client went to the website and everything worked out there. Uploading the software itself on the website costs about PLN 200. What do you diagnose?

baadbooyy · Answer

I was with one mechanic, he diagnosed me with such a universal program ... not a specific one for a Mercedes ... the car has catalytic converters and I wonder if they are clogged ...

Mateusz1560 · Answer

Where are you from ? It's best if you drive to someone who has SD, a universal computer may not show everything.

baadbooyy · Answer

Kalisz area .. well, I have to go somewhere it was in your case that the new engine control software and the car flashed ??

Mateusz1560 · Answer

Not quite after uploading the new software, only the real defects were found, which were masked with this soft silly

baadbooyy · Answer

So what were these real glitches, if you can know?

2007 Mercedes ML 320 CDI: No Power, Slow Acceleration, EGR Valve & Possible Injector Issues

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