Hello!

I got a Mercedes GL 300cdi (v6 diesel) from 2007.

It juggers at hard ish/very hard acceleration. On easy pedal it's fine.
Changed air filters and dieselfilter, diesel treatment with some better results.

After diagnostic with Foxwell obd tool, it looks like MAF is stable and turbo is not juddering that much, but the diesel high pressure is juddering alot!

I did a scoop read on Boost pressure and Dieselpressure, and you can see diesel is dropping alot even on acceleration when the turbo is rising the diesel is dropping..

Can some tell if they got some same experiance or had same fault like this before?

Added the reads on attachement.
channel A (blue) is fuel pressure, channel B (red) is boost.

Regards, Johan.

Hi Johan
Your captures dont convey a lot to me as presented. In pico Help select Online Documentation click on Videos select Frank Masseys #7 and # 8 [petrol] following along those lines should give you a more definitive fuel system test , there is also a video on Air mass vs turbo . Also check the turbo charge hoses for fractures that may valve open and closed with engine torque . Cheers Ron

The last video mentioned is Air mass meter vs Rail pressure not turbo as stated . Ron